213724257885 has 64 divisors (see below), whose sum is σ = 388381493760. Its totient is φ = 112879013184.

The previous prime is 213724257881. The next prime is 213724257893. The reversal of 213724257885 is 588752427312.

213724257885 is a `hidden beast` number, since 2 + 1 + 3 + 72 + 425 + 78 + 85 = 666.

It is not a de Polignac number, because 213724257885 - 2² = 213724257881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213724257881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1031427 + ... + 1221183.

It is an arithmetic number, because the mean of its divisors is an integer number (6068460840).

Almost surely, 2^213724257885 is an apocalyptic number.

It is an amenable number.

213724257885 is a deficient number, since it is larger than the sum of its proper divisors (174657235875).

213724257885 is an equidigital number, since it uses as much as digits as its factorization.

213724257885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189886 (or 189868 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 54.

The spelling of 213724257885 in words is "two hundred thirteen billion, seven hundred twenty-four million, two hundred fifty-seven thousand, eight hundred eighty-five".