251930 has 32 divisors (see below), whose sum is σ = 535680. Its totient is φ = 83520.

The previous prime is 251917. The next prime is 251939. The reversal of 251930 is 39152.

251930 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (251939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4100 + ... + 4160.

It is an arithmetic number, because the mean of its divisors is an integer number (16740).

2²⁵¹⁹³⁰ is an apocalyptic number.

251930 is an abundant number, since it is smaller than the sum of its proper divisors (283750).

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

251930 is a wasteful number, since it uses less digits than its factorization.

251930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 251930 is about 501.9262894091. The cubic root of 251930 is about 63.1577469538.

The spelling of 251930 in words is "two hundred fifty-one thousand, nine hundred thirty".