139815552 has 32 divisors (see below), whose sum is σ = 371386080. Its totient is φ = 46605056.

The previous prime is 139815541. The next prime is 139815587. The reversal of 139815552 is 255518931.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 139815552.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181668 + ... + 182435.

It is an arithmetic number, because the mean of its divisors is an integer number (11605815).

Almost surely, 2^139815552 is an apocalyptic number.

139815552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139815552 is an abundant number, since it is smaller than the sum of its proper divisors (231570528).

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

139815552 is an equidigital number, since it uses as much as digits as its factorization.

139815552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364120 (or 364108 counting only the distinct ones).

The product of its digits is 54000, while the sum is 39.

The square root of 139815552 is about 11824.3626466715. The cubic root of 139815552 is about 519.0212754076.

The spelling of 139815552 in words is "one hundred thirty-nine million, eight hundred fifteen thousand, five hundred fifty-two".