213975766 has 16 divisors (see below), whose sum is σ = 327398400. Its totient is φ = 104862888.

The previous prime is 213975763. The next prime is 213975799. The reversal of 213975766 is 667579312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213975763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17091 + ... + 26833.

It is an arithmetic number, because the mean of its divisors is an integer number (20462400).

Almost surely, 2^213975766 is an apocalyptic number.

213975766 is a deficient number, since it is larger than the sum of its proper divisors (113422634).

213975766 is a wasteful number, since it uses less digits than its factorization.

213975766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9963.

The product of its digits is 476280, while the sum is 46.

The square root of 213975766 is about 14627.9105138089. The cubic root of 213975766 is about 598.1198236416.

The spelling of 213975766 in words is "two hundred thirteen million, nine hundred seventy-five thousand, seven hundred sixty-six".