216572136 has 32 divisors (see below), whose sum is σ = 590652000. Its totient is φ = 65627840.

The previous prime is 216572131. The next prime is 216572159. The reversal of 216572136 is 631275612.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 216572097 and 216572106.

It is not an unprimeable number, because it can be changed into a prime (216572131) 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, 409911 + ... + 410438.

It is an arithmetic number, because the mean of its divisors is an integer number (18457875).

Almost surely, 2^216572136 is an apocalyptic number.

It is an amenable number.

216572136 is an abundant number, since it is smaller than the sum of its proper divisors (374079864).

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

216572136 is a wasteful number, since it uses less digits than its factorization.

216572136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820369 (or 820365 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 216572136 is about 14716.3900464754. The cubic root of 216572136 is about 600.5292885077.

The spelling of 216572136 in words is "two hundred sixteen million, five hundred seventy-two thousand, one hundred thirty-six".