213777831057 has 32 divisors (see below), whose sum is σ = 330616442880. Its totient is φ = 120339186240.

The previous prime is 213777831031. The next prime is 213777831073. The reversal of 213777831057 is 750138777312.

It is not a de Polignac number, because 213777831057 - 2¹⁰ = 213777830033 is a prime.

It is a super-2 number, since 2×213777831057² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213777831097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1774108 + ... + 1890770.

It is an arithmetic number, because the mean of its divisors is an integer number (10331763840).

Almost surely, 2^213777831057 is an apocalyptic number.

It is an amenable number.

213777831057 is a deficient number, since it is larger than the sum of its proper divisors (116838611823).

213777831057 is a wasteful number, since it uses less digits than its factorization.

213777831057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117973.

The product of its (nonzero) digits is 1728720, while the sum is 51.

The spelling of 213777831057 in words is "two hundred thirteen billion, seven hundred seventy-seven million, eight hundred thirty-one thousand, fifty-seven".