251260530 has 16 divisors (see below), whose sum is σ = 603025344. Its totient is φ = 67002800.

The previous prime is 251260523. The next prime is 251260571. The reversal of 251260530 is 35062152.

It is a self number, because there is not a number n which added to its sum of digits gives 251260530.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4187646 + ... + 4187705.

It is an arithmetic number, because the mean of its divisors is an integer number (37689084).

Almost surely, 2^251260530 is an apocalyptic number.

251260530 is an abundant number, since it is smaller than the sum of its proper divisors (351764814).

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

251260530 is a wasteful number, since it uses less digits than its factorization.

251260530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8375361.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 251260530 is about 15851.1996391440. The cubic root of 251260530 is about 631.0175292728.

The spelling of 251260530 in words is "two hundred fifty-one million, two hundred sixty thousand, five hundred thirty".