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139542550 = 2527398693
BaseRepresentation
bin10000101000101…
…00000000010110
3100201120111101121
420110110000112
5241210330200
621502514154
73313043410
oct1024240026
9321514347
10139542550
117184a424
123a89595a
1322baa074
14147659b0
15c3b5e1a
hex8514016

139542550 has 24 divisors (see below), whose sum is σ = 296628336. Its totient is φ = 47843040.

The previous prime is 139542547. The next prime is 139542569. The reversal of 139542550 is 55245931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198997 + ... + 199696.

It is an arithmetic number, because the mean of its divisors is an integer number (12359514).

Almost surely, 2139542550 is an apocalyptic number.

139542550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139542550 is an abundant number, since it is smaller than the sum of its proper divisors (157085786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139542550 is a wasteful number, since it uses less digits than its factorization.

139542550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398712 (or 398707 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 139542550 is about 11812.8129588172. The cubic root of 139542550 is about 518.6832439380.

The spelling of 139542550 in words is "one hundred thirty-nine million, five hundred forty-two thousand, five hundred fifty".

Divisors: 1 2 5 7 10 14 25 35 50 70 175 350 398693 797386 1993465 2790851 3986930 5581702 9967325 13954255 19934650 27908510 69771275 139542550