213203864 has 32 divisors (see below), whose sum is σ = 434380800. Its totient is φ = 97731360.

The previous prime is 213203803. The next prime is 213203897. The reversal of 213203864 is 468302312.

It is a congruent number.

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, 17912 + ... + 27335.

It is an arithmetic number, because the mean of its divisors is an integer number (13574400).

Almost surely, 2^213203864 is an apocalyptic number.

It is an amenable number.

213203864 is an abundant number, since it is smaller than the sum of its proper divisors (221176936).

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

213203864 is a wasteful number, since it uses less digits than its factorization.

213203864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45303 (or 45299 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 213203864 is about 14601.5021145086. The cubic root of 213203864 is about 597.3997324790.

The spelling of 213203864 in words is "two hundred thirteen million, two hundred three thousand, eight hundred sixty-four".