213497644 has 12 divisors (see below), whose sum is σ = 379197784. Its totient is φ = 105155424.

The previous prime is 213497633. The next prime is 213497653. The reversal of 213497644 is 446794312.

It is a junction number, because it is equal to n+sod(n) for n = 213497597 and 213497606.

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, 398049 + ... + 398584.

Almost surely, 2^213497644 is an apocalyptic number.

It is an amenable number.

213497644 is a deficient number, since it is larger than the sum of its proper divisors (165700140).

213497644 is a wasteful number, since it uses less digits than its factorization.

213497644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796704 (or 796702 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 213497644 is about 14611.5585753197. The cubic root of 213497644 is about 597.6739982154.

The spelling of 213497644 in words is "two hundred thirteen million, four hundred ninety-seven thousand, six hundred forty-four".