156031020 has 144 divisors (see below), whose sum is σ = 497689920. Its totient is φ = 39513600.

The previous prime is 156031009. The next prime is 156031027. The reversal of 156031020 is 20130651.

156031020 is a `hidden beast` number, since 1 + 560 + 3 + 102 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 156030984 and 156031002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156031027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 370410 + ... + 370830.

It is an arithmetic number, because the mean of its divisors is an integer number (3456180).

Almost surely, 2^156031020 is an apocalyptic number.

156031020 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 156031020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248844960).

156031020 is an abundant number, since it is smaller than the sum of its proper divisors (341658900).

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

156031020 is a wasteful number, since it uses less digits than its factorization.

156031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 156031020 is about 12491.2377289042. The cubic root of 156031020 is about 538.3569398814.

Adding to 156031020 its reverse (20130651), we get a palindrome (176161671).

The spelling of 156031020 in words is "one hundred fifty-six million, thirty-one thousand, twenty".