213153556434 has 32 divisors (see below), whose sum is σ = 524685678720. Its totient is φ = 56216322432.

The previous prime is 213153556433. The next prime is 213153556463. The reversal of 213153556434 is 434655351312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (213153556433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195195019 + ... + 195196110.

It is an arithmetic number, because the mean of its divisors is an integer number (16396427460).

Almost surely, 2^213153556434 is an apocalyptic number.

213153556434 is an abundant number, since it is smaller than the sum of its proper divisors (311532122286).

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

213153556434 is a wasteful number, since it uses less digits than its factorization.

213153556434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390391154.

The product of its digits is 648000, while the sum is 42.

The spelling of 213153556434 in words is "two hundred thirteen billion, one hundred fifty-three million, five hundred fifty-six thousand, four hundred thirty-four".