156561312 has 96 divisors (see below), whose sum is σ = 422985024. Its totient is φ = 50688000.

The previous prime is 156561289. The next prime is 156561341. The reversal of 156561312 is 213165651.

156561312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×156561312² = 49022888830322688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 156561312.

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, 649512 + ... + 649752.

It is an arithmetic number, because the mean of its divisors is an integer number (4406094).

Almost surely, 2^156561312 is an apocalyptic number.

156561312 is a gapful number since it is divisible by the number (12) 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 156561312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211492512).

156561312 is an abundant number, since it is smaller than the sum of its proper divisors (266423712).

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

156561312 is a wasteful number, since it uses less digits than its factorization.

156561312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 414 counting only the distinct ones).

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

The square root of 156561312 is about 12512.4462836010. The cubic root of 156561312 is about 538.9661426041.

The spelling of 156561312 in words is "one hundred fifty-six million, five hundred sixty-one thousand, three hundred twelve".