812521032 has 32 divisors (see below), whose sum is σ = 2034559680. Its totient is φ = 270406080.

The previous prime is 812521019. The next prime is 812521033. The reversal of 812521032 is 230125218.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 812520993 and 812521011.

It is not an unprimeable number, because it can be changed into a prime (812521033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11683 + ... + 41970.

It is an arithmetic number, because the mean of its divisors is an integer number (63579990).

Almost surely, 2^812521032 is an apocalyptic number.

It is an amenable number.

812521032 is an abundant number, since it is smaller than the sum of its proper divisors (1222038648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

812521032 is a wasteful number, since it uses less digits than its factorization.

812521032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54293 (or 54289 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 812521032 is about 28504.7545507763. The cubic root of 812521032 is about 933.1358406399.

The spelling of 812521032 in words is "eight hundred twelve million, five hundred twenty-one thousand, thirty-two".