813451252 has 6 divisors (see below), whose sum is σ = 1423539698. Its totient is φ = 406725624.

The previous prime is 813451217. The next prime is 813451267. The reversal of 813451252 is 252154318.

It can be written as a sum of positive squares in only one way, i.e., 801795856 + 11655396 = 28316^2 + 3414^2 .

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, 101681403 + ... + 101681410.

Almost surely, 2^813451252 is an apocalyptic number.

It is an amenable number.

813451252 is a deficient number, since it is larger than the sum of its proper divisors (610088446).

813451252 is a wasteful number, since it uses less digits than its factorization.

813451252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203362817 (or 203362815 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 813451252 is about 28521.0668103421. The cubic root of 813451252 is about 933.4918070476.

The spelling of 813451252 in words is "eight hundred thirteen million, four hundred fifty-one thousand, two hundred fifty-two".