810252250 has 64 divisors (see below), whose sum is σ = 1567841184. Its totient is φ = 313344000.

The previous prime is 810252227. The next prime is 810252269. The reversal of 810252250 is 52252018.

It can be written as a sum of positive squares in 16 ways, for example, as 8059921 + 802192329 = 2839^2 + 28323^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1403962 + ... + 1404538.

Almost surely, 2^810252250 is an apocalyptic number.

810252250 is a deficient number, since it is larger than the sum of its proper divisors (757588934).

810252250 is a wasteful number, since it uses less digits than its factorization.

810252250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772 (or 762 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 810252250 is about 28464.9301773252. The cubic root of 810252250 is about 932.2665071010.

The spelling of 810252250 in words is "eight hundred ten million, two hundred fifty-two thousand, two hundred fifty".