251250530 has 16 divisors (see below), whose sum is σ = 453865464. Its totient is φ = 100141440.

The previous prime is 251250523. The next prime is 251250553. The reversal of 251250530 is 35052152.

It can be written as a sum of positive squares in 4 ways, for example, as 212897281 + 38353249 = 14591^2 + 6193^2 .

It is a junction number, because it is equal to n+sod(n) for n = 251250496 and 251250505.

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 7 ways as a sum of consecutive naturals, for example, 41897 + ... + 47516.

Almost surely, 2^251250530 is an apocalyptic number.

251250530 is a deficient number, since it is larger than the sum of its proper divisors (202614934).

251250530 is a wasteful number, since it uses less digits than its factorization.

251250530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89701.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 251250530 is about 15850.8842024664. The cubic root of 251250530 is about 631.0091578040.

The spelling of 251250530 in words is "two hundred fifty-one million, two hundred fifty thousand, five hundred thirty".