216702972 has 48 divisors (see below), whose sum is σ = 574900480. Its totient is φ = 70552944.

The previous prime is 216702971. The next prime is 216702979. The reversal of 216702972 is 279207612.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216702971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18688 + ... + 27975.

Almost surely, 2^216702972 is an apocalyptic number.

It is an amenable number.

216702972 is an abundant number, since it is smaller than the sum of its proper divisors (358197508).

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

216702972 is a wasteful number, since it uses less digits than its factorization.

216702972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46719 (or 46711 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 216702972 is about 14720.8346230776. The cubic root of 216702972 is about 600.6501951559.

It can be divided in two parts, 21670 and 2972, that added together give a palindrome (24642).

The spelling of 216702972 in words is "two hundred sixteen million, seven hundred two thousand, nine hundred seventy-two".