215135900 has 36 divisors (see below), whose sum is σ = 533538768. Its totient is φ = 73760640.

The previous prime is 215135887. The next prime is 215135903. The reversal of 215135900 is 9531512.

It is a self number, because there is not a number n which added to its sum of digits gives 215135900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215135903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 152969 + ... + 154368.

Almost surely, 2^215135900 is an apocalyptic number.

215135900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215135900 is an abundant number, since it is smaller than the sum of its proper divisors (318402868).

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

215135900 is a wasteful number, since it uses less digits than its factorization.

215135900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307358 (or 307351 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 215135900 is about 14667.5117180795. The cubic root of 215135900 is about 599.1988381163.

The spelling of 215135900 in words is "two hundred fifteen million, one hundred thirty-five thousand, nine hundred".