139213056 has 72 divisors (see below), whose sum is σ = 374133760. Its totient is φ = 45950976.

The previous prime is 139213031. The next prime is 139213097. The reversal of 139213056 is 650312931.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82881 + ... + 84543.

Almost surely, 2^139213056 is an apocalyptic number.

139213056 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 139213056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187066880).

139213056 is an abundant number, since it is smaller than the sum of its proper divisors (234920704).

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

139213056 is a wasteful number, since it uses less digits than its factorization.

139213056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791 (or 1777 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 139213056 is about 11798.8582498477. The cubic root of 139213056 is about 518.2746763049.

Adding to 139213056 its reverse (650312931), we get a palindrome (789525987).

The spelling of 139213056 in words is "one hundred thirty-nine million, two hundred thirteen thousand, fifty-six".