139251522 has 32 divisors (see below), whose sum is σ = 307711872. Its totient is φ = 41786624.

The previous prime is 139251521. The next prime is 139251529. The reversal of 139251522 is 225152931.

It is a self number, because there is not a number n which added to its sum of digits gives 139251522.

It is not an unprimeable number, because it can be changed into a prime (139251521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27333 + ... + 32024.

It is an arithmetic number, because the mean of its divisors is an integer number (9615996).

Almost surely, 2^139251522 is an apocalyptic number.

139251522 is an abundant number, since it is smaller than the sum of its proper divisors (168460350).

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

139251522 is a wasteful number, since it uses less digits than its factorization.

139251522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59402.

The product of its digits is 5400, while the sum is 30.

The square root of 139251522 is about 11800.4882102394. The cubic root of 139251522 is about 518.3224067846.

The spelling of 139251522 in words is "one hundred thirty-nine million, two hundred fifty-one thousand, five hundred twenty-two".