156201556 has 48 divisors (see below), whose sum is σ = 331591680. Its totient is φ = 62932320.

The previous prime is 156201553. The next prime is 156201607. The reversal of 156201556 is 655102651.

156201556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×156201556² = 48797852193642272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156201553) 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, 35941 + ... + 40051.

It is an arithmetic number, because the mean of its divisors is an integer number (6908160).

Almost surely, 2^156201556 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 156201556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165795840).

156201556 is an abundant number, since it is smaller than the sum of its proper divisors (175390124).

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

156201556 is a wasteful number, since it uses less digits than its factorization.

156201556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4204 (or 4202 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 156201556 is about 12498.0620897802. The cubic root of 156201556 is about 538.5530030561.

The spelling of 156201556 in words is "one hundred fifty-six million, two hundred one thousand, five hundred fifty-six".