813188102 has 4 divisors (see below), whose sum is σ = 1219782156. Its totient is φ = 406594050.

The previous prime is 813188059. The next prime is 813188113. The reversal of 813188102 is 201881318.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×813188102² = 1322549778468724808, which contains 22 as substring.

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, 203297024 + ... + 203297027.

It is an arithmetic number, because the mean of its divisors is an integer number (304945539).

Almost surely, 2^813188102 is an apocalyptic number.

813188102 is a deficient number, since it is larger than the sum of its proper divisors (406594054).

813188102 is a wasteful number, since it uses less digits than its factorization.

813188102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406594053.

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 813188102 is about 28516.4531805763. The cubic root of 813188102 is about 933.3911352241.

The spelling of 813188102 in words is "eight hundred thirteen million, one hundred eighty-eight thousand, one hundred two".