811051025 has 6 divisors (see below), whose sum is σ = 1005703302. Its totient is φ = 648840800.

The previous prime is 811051019. The next prime is 811051039. The reversal of 811051025 is 520150118.

It can be written as a sum of positive squares in 3 ways, for example, as 173791489 + 637259536 = 13183^2 + 25244^2 .

It is not a de Polignac number, because 811051025 - 2⁴ = 811051009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16220996 + ... + 16221045.

It is an arithmetic number, because the mean of its divisors is an integer number (167617217).

Almost surely, 2^811051025 is an apocalyptic number.

It is an amenable number.

811051025 is a deficient number, since it is larger than the sum of its proper divisors (194652277).

811051025 is a wasteful number, since it uses less digits than its factorization.

811051025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32442051 (or 32442046 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 811051025 is about 28478.9575827487. The cubic root of 811051025 is about 932.5727601251.

The spelling of 811051025 in words is "eight hundred eleven million, fifty-one thousand, twenty-five".