812552900 has 18 divisors (see below), whose sum is σ = 1763240010. Its totient is φ = 325021120.

The previous prime is 812552887. The next prime is 812552903. The reversal of 812552900 is 9255218.

It can be written as a sum of positive squares in 3 ways, for example, as 45373696 + 767179204 = 6736^2 + 27698^2 .

It is not an unprimeable number, because it can be changed into a prime (812552903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4062665 + ... + 4062864.

Almost surely, 2^812552900 is an apocalyptic number.

It is an amenable number.

812552900 is an abundant number, since it is smaller than the sum of its proper divisors (950687110).

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

812552900 is a wasteful number, since it uses less digits than its factorization.

812552900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8125543 (or 8125536 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 812552900 is about 28505.3135397596. The cubic root of 812552900 is about 933.1480400305.

The spelling of 812552900 in words is "eight hundred twelve million, five hundred fifty-two thousand, nine hundred".