215123880 has 64 divisors (see below), whose sum is σ = 666201600. Its totient is φ = 55514880.

The previous prime is 215123869. The next prime is 215123891. The reversal of 215123880 is 88321512.

It is an interprime number because it is at equal distance from previous prime (215123869) and next prime (215123891).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 25195 + ... + 32634.

It is an arithmetic number, because the mean of its divisors is an integer number (10409400).

Almost surely, 2^215123880 is an apocalyptic number.

215123880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215123880 is an abundant number, since it is smaller than the sum of its proper divisors (451077720).

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

215123880 is a wasteful number, since it uses less digits than its factorization.

215123880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57874 (or 57870 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 215123880 is about 14667.1019632373. The cubic root of 215123880 is about 599.1876784971.

The spelling of 215123880 in words is "two hundred fifteen million, one hundred twenty-three thousand, eight hundred eighty".