213860812 has 24 divisors (see below), whose sum is σ = 408683520. Its totient is φ = 97113360.

The previous prime is 213860771. The next prime is 213860837. The reversal of 213860812 is 218068312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61989 + ... + 65347.

It is an arithmetic number, because the mean of its divisors is an integer number (17028480).

Almost surely, 2^213860812 is an apocalyptic number.

213860812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

213860812 is a deficient number, since it is larger than the sum of its proper divisors (194822708).

213860812 is a wasteful number, since it uses less digits than its factorization.

213860812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4821 (or 4819 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 213860812 is about 14623.9807166175. The cubic root of 213860812 is about 598.0126953379.

The spelling of 213860812 in words is "two hundred thirteen million, eight hundred sixty thousand, eight hundred twelve".