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48149721 = 362572
BaseRepresentation
bin1011011110101…
…1010011011001
310100121021000000
42313223103121
544311242341
64440003213
71123160124
oct267532331
9110537000
1048149721
11251a7664
1214160509
139c8b179
1465753bb
1543618b6
hex2deb4d9

48149721 has 21 divisors (see below), whose sum is σ = 72473551. Its totient is φ = 31974912.

The previous prime is 48149701. The next prime is 48149753. The reversal of 48149721 is 12794184.

The square root of 48149721 is 6939.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 47403225 + 746496 = 6885^2 + 864^2 .

It is not a de Polignac number, because 48149721 - 225 = 14595289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (48149701) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 187225 + ... + 187481.

Almost surely, 248149721 is an apocalyptic number.

48149721 is the 6939-th square number.

48149721 is the 3470-th centered octagonal number.

It is an amenable number.

48149721 is a deficient number, since it is larger than the sum of its proper divisors (24323830).

48149721 is an frugal number, since it uses more digits than its factorization.

48149721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 260 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The cubic root of 48149721 is about 363.8015890269.

Multiplying 48149721 by its sum of digits (36), we get a square (1733389956 = 416342).

It can be divided in two parts, 4814 and 9721, that added together give a triangular number (14535 = T170).

The spelling of 48149721 in words is "forty-eight million, one hundred forty-nine thousand, seven hundred twenty-one".

Divisors: 1 3 9 27 81 243 257 729 771 2313 6939 20817 62451 66049 187353 198147 594441 1783323 5349969 16049907 48149721