251481948 has 24 divisors (see below), whose sum is σ = 617675520. Its totient is φ = 79415280.

The previous prime is 251481947. The next prime is 251481959. The reversal of 251481948 is 849184152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251481941) by changing a digit.

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, 551268 + ... + 551723.

It is an arithmetic number, because the mean of its divisors is an integer number (25736480).

Almost surely, 2^251481948 is an apocalyptic number.

It is an amenable number.

251481948 is an abundant number, since it is smaller than the sum of its proper divisors (366193572).

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

251481948 is a wasteful number, since it uses less digits than its factorization.

251481948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103017 (or 1103015 counting only the distinct ones).

The product of its digits is 92160, while the sum is 42.

The square root of 251481948 is about 15858.1823674720. The cubic root of 251481948 is about 631.2028317793.

The spelling of 251481948 in words is "two hundred fifty-one million, four hundred eighty-one thousand, nine hundred forty-eight".