156533020 has 96 divisors (see below), whose sum is σ = 400780800. Its totient is φ = 50160384.

The previous prime is 156532997. The next prime is 156533021. The reversal of 156533020 is 20335651.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156533021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220426 + ... + 221134.

It is an arithmetic number, because the mean of its divisors is an integer number (4174800).

Almost surely, 2^156533020 is an apocalyptic number.

156533020 is a gapful number since it is divisible by the number (10) 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 156533020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200390400).

156533020 is an abundant number, since it is smaller than the sum of its proper divisors (244247780).

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

156533020 is a wasteful number, since it uses less digits than its factorization.

156533020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 156533020 is about 12511.3156782171. The cubic root of 156533020 is about 538.9336753478.

Adding to 156533020 its reverse (20335651), we get a palindrome (176868671).

The spelling of 156533020 in words is "one hundred fifty-six million, five hundred thirty-three thousand, twenty".