215500672 has 32 divisors (see below), whose sum is σ = 435217680. Its totient is φ = 106269696.

The previous prime is 215500669. The next prime is 215500673. The reversal of 215500672 is 276005512.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 215500672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215500673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2188 + ... + 20875.

Almost surely, 2^215500672 is an apocalyptic number.

It is an amenable number.

215500672 is an abundant number, since it is smaller than the sum of its proper divisors (219717008).

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

215500672 is an equidigital number, since it uses as much as digits as its factorization.

215500672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23150 (or 23138 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 215500672 is about 14679.9411442962. The cubic root of 215500672 is about 599.5373025361.

It can be divided in two parts, 21550067 and 2, that multiplied together give a palindrome (43100134).

The spelling of 215500672 in words is "two hundred fifteen million, five hundred thousand, six hundred seventy-two".