213977156 has 12 divisors (see below), whose sum is σ = 377154960. Its totient is φ = 106218600.

The previous prime is 213977131. The next prime is 213977177. The reversal of 213977156 is 651779312.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191870 + ... + 192981.

It is an arithmetic number, because the mean of its divisors is an integer number (31429580).

Almost surely, 2^213977156 is an apocalyptic number.

It is an amenable number.

213977156 is a deficient number, since it is larger than the sum of its proper divisors (163177804).

213977156 is a wasteful number, since it uses less digits than its factorization.

213977156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384994 (or 384992 counting only the distinct ones).

The product of its digits is 79380, while the sum is 41.

The square root of 213977156 is about 14627.9580256439. The cubic root of 213977156 is about 598.1211187801.

The spelling of 213977156 in words is "two hundred thirteen million, nine hundred seventy-seven thousand, one hundred fifty-six".