213670722556 has 6 divisors (see below), whose sum is σ = 373923764480. Its totient is φ = 106835361276.

The previous prime is 213670722547. The next prime is 213670722563. The reversal of 213670722556 is 655227076312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26708840316 + ... + 26708840323.

Almost surely, 2^213670722556 is an apocalyptic number.

It is an amenable number.

213670722556 is a deficient number, since it is larger than the sum of its proper divisors (160253041924).

213670722556 is a wasteful number, since it uses less digits than its factorization.

213670722556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53417680643 (or 53417680641 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 46.

Adding to 213670722556 its reverse (655227076312), we get a palindrome (868897798868).

The spelling of 213670722556 in words is "two hundred thirteen billion, six hundred seventy million, seven hundred twenty-two thousand, five hundred fifty-six".