139311056 has 60 divisors (see below), whose sum is σ = 293649732. Its totient is φ = 63802368.

The previous prime is 139311043. The next prime is 139311061. The reversal of 139311056 is 650113931.

139311056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 65351056 + 73960000 = 8084^2 + 8600^2 .

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, 502790 + ... + 503066.

Almost surely, 2^139311056 is an apocalyptic number.

139311056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139311056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146824866).

139311056 is an abundant number, since it is smaller than the sum of its proper divisors (154338676).

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

139311056 is a wasteful number, since it uses less digits than its factorization.

139311056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 139311056 is about 11803.0104634369. The cubic root of 139311056 is about 518.3962621346.

Adding to 139311056 its reverse (650113931), we get a palindrome (789424987).

The spelling of 139311056 in words is "one hundred thirty-nine million, three hundred eleven thousand, fifty-six".