213921649772 has 12 divisors (see below), whose sum is σ = 374386488840. Its totient is φ = 106954081536.

The previous prime is 213921649757. The next prime is 213921649789. The reversal of 213921649772 is 277946129312.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1614122 + ... + 1741617.

It is an arithmetic number, because the mean of its divisors is an integer number (31198874070).

Almost surely, 2^213921649772 is an apocalyptic number.

It is an amenable number.

213921649772 is a deficient number, since it is larger than the sum of its proper divisors (160464839068).

213921649772 is a wasteful number, since it uses less digits than its factorization.

213921649772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3371680 (or 3371678 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 53.

The spelling of 213921649772 in words is "two hundred thirteen billion, nine hundred twenty-one million, six hundred forty-nine thousand, seven hundred seventy-two".