156219972 has 24 divisors (see below), whose sum is σ = 369129600. Its totient is φ = 51413856.

The previous prime is 156219949. The next prime is 156219977. The reversal of 156219972 is 279912651.

156219972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (156219977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81447 + ... + 83342.

It is an arithmetic number, because the mean of its divisors is an integer number (15380400).

Almost surely, 2^156219972 is an apocalyptic number.

156219972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

156219972 is an abundant number, since it is smaller than the sum of its proper divisors (212909628).

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

156219972 is a wasteful number, since it uses less digits than its factorization.

156219972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164875 (or 164873 counting only the distinct ones).

The product of its digits is 68040, while the sum is 42.

The square root of 156219972 is about 12498.7988222869. The cubic root of 156219972 is about 538.5741671695.

The spelling of 156219972 in words is "one hundred fifty-six million, two hundred nineteen thousand, nine hundred seventy-two".