213644392234 has 64 divisors (see below), whose sum is σ = 403921115136. Its totient is φ = 82485998784.

The previous prime is 213644392219. The next prime is 213644392271. The reversal of 213644392234 is 432293446312.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10218139 + ... + 10239025.

It is an arithmetic number, because the mean of its divisors is an integer number (6311267424).

Almost surely, 2^213644392234 is an apocalyptic number.

213644392234 is a deficient number, since it is larger than the sum of its proper divisors (190276722902).

213644392234 is a wasteful number, since it uses less digits than its factorization.

213644392234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22259.

The product of its digits is 746496, while the sum is 43.

The spelling of 213644392234 in words is "two hundred thirteen billion, six hundred forty-four million, three hundred ninety-two thousand, two hundred thirty-four".