213181174830 has 48 divisors (see below), whose sum is σ = 554018782320. Its totient is φ = 52475364864.

The previous prime is 213181174807. The next prime is 213181174837. The reversal of 213181174830 is 38471181312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213181174837) 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 23 ways as a sum of consecutive naturals, for example, 21018715 + ... + 21028854.

It is an arithmetic number, because the mean of its divisors is an integer number (11542057965).

Almost surely, 2^213181174830 is an apocalyptic number.

213181174830 is an abundant number, since it is smaller than the sum of its proper divisors (340837607490).

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

213181174830 is a wasteful number, since it uses less digits than its factorization.

213181174830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42047605 (or 42047592 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 213181174830 in words is "two hundred thirteen billion, one hundred eighty-one million, one hundred seventy-four thousand, eight hundred thirty".