213934457 has 16 divisors (see below), whose sum is σ = 237714048. Its totient is φ = 190903680.

The previous prime is 213934453. The next prime is 213934489. The reversal of 213934457 is 754439312.

It is not a de Polignac number, because 213934457 - 2² = 213934453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213934457.

It is not an unprimeable number, because it can be changed into a prime (213934453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210683 + ... + 211695.

It is an arithmetic number, because the mean of its divisors is an integer number (14857128).

Almost surely, 2^213934457 is an apocalyptic number.

It is an amenable number.

213934457 is a deficient number, since it is larger than the sum of its proper divisors (23779591).

213934457 is a wasteful number, since it uses less digits than its factorization.

213934457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360.

The product of its digits is 90720, while the sum is 38.

The square root of 213934457 is about 14626.4984531500. The cubic root of 213934457 is about 598.0813312422.

The spelling of 213934457 in words is "two hundred thirteen million, nine hundred thirty-four thousand, four hundred fifty-seven".