213257799808 has 16 divisors (see below), whose sum is σ = 424849523310. Its totient is φ = 106628899840.

The previous prime is 213257799721. The next prime is 213257799823. The reversal of 213257799808 is 808997752312.

213257799808 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 210710377024 + 2547422784 = 459032^2 + 50472^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833038153 + ... + 833038408.

Almost surely, 2^213257799808 is an apocalyptic number.

It is an amenable number.

213257799808 is a deficient number, since it is larger than the sum of its proper divisors (211591723502).

213257799808 is an equidigital number, since it uses as much as digits as its factorization.

213257799808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666076575 (or 1666076563 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 61.

The spelling of 213257799808 in words is "two hundred thirteen billion, two hundred fifty-seven million, seven hundred ninety-nine thousand, eight hundred eight".