213115924 has 12 divisors (see below), whose sum is σ = 426231904. Its totient is φ = 91335384.

The previous prime is 213115921. The next prime is 213115937. The reversal of 213115924 is 429511312.

213115924 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 7611283 = 213115924 / (2 + 1 + 3 + 1 + 1 + 5 + 9 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 213115892 and 213115901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213115921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3805614 + ... + 3805669.

Almost surely, 2^213115924 is an apocalyptic number.

It is an amenable number.

213115924 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

213115924 is a wasteful number, since it uses less digits than its factorization.

213115924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7611294 (or 7611292 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 213115924 is about 14598.4904699082. The cubic root of 213115924 is about 597.3175848790.

The spelling of 213115924 in words is "two hundred thirteen million, one hundred fifteen thousand, nine hundred twenty-four".