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30101925 = 352728191
BaseRepresentation
bin111001011010…
…1000110100101
32002122100002010
41302311012211
530201230200
62553104433
7513601500
oct162650645
962570063
1030101925
1115aa0027
12a0b8119
13630c4b9
143dd8137
152999150
hex1cb51a5

30101925 has 36 divisors (see below), whose sum is σ = 57901056. Its totient is φ = 13759200.

The previous prime is 30101891. The next prime is 30101927. The reversal of 30101925 is 52910103.

It is not a de Polignac number, because 30101925 - 212 = 30097829 is a prime.

It is a super-2 number, since 2×301019252 = 1812251777411250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30101927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 421 + ... + 7770.

Almost surely, 230101925 is an apocalyptic number.

30101925 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30101925 is a deficient number, since it is larger than the sum of its proper divisors (27799131).

30101925 is a wasteful number, since it uses less digits than its factorization.

30101925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8218 (or 8206 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 30101925 is about 5486.5221224379. The cubic root of 30101925 is about 311.0747469071.

The spelling of 30101925 in words is "thirty million, one hundred one thousand, nine hundred twenty-five".

Divisors: 1 3 5 7 15 21 25 35 49 75 105 147 175 245 525 735 1225 3675 8191 24573 40955 57337 122865 172011 204775 286685 401359 614325 860055 1204077 1433425 2006795 4300275 6020385 10033975 30101925