156221104 has 80 divisors (see below), whose sum is σ = 341978112. Its totient is φ = 68649984.

The previous prime is 156221099. The next prime is 156221113. The reversal of 156221104 is 401122651.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407697 + ... + 408079.

Almost surely, 2^156221104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156221104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170989056).

156221104 is an abundant number, since it is smaller than the sum of its proper divisors (185757008).

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

156221104 is a wasteful number, since it uses less digits than its factorization.

156221104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 156221104 is about 12498.8441065564. The cubic root of 156221104 is about 538.5754680371.

Adding to 156221104 its reverse (401122651), we get a palindrome (557343755).

The spelling of 156221104 in words is "one hundred fifty-six million, two hundred twenty-one thousand, one hundred four".