213580537974 has 96 divisors (see below), whose sum is σ = 499336437600. Its totient is φ = 65756344320.

The previous prime is 213580537949. The next prime is 213580537979. The reversal of 213580537974 is 479735085312.

213580537974 is a `hidden beast` number, since 2 + 1 + 3 + 580 + 53 + 7 + 9 + 7 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 213580537974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213580537979) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24576222 + ... + 24584910.

It is an arithmetic number, because the mean of its divisors is an integer number (5201421225).

Almost surely, 2^213580537974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213580537974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249668218800).

213580537974 is an abundant number, since it is smaller than the sum of its proper divisors (285755899626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213580537974 is a wasteful number, since it uses less digits than its factorization.

213580537974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10510 (or 10507 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 54.

The spelling of 213580537974 in words is "two hundred thirteen billion, five hundred eighty million, five hundred thirty-seven thousand, nine hundred seventy-four".