251049375 has 140 divisors (see below), whose sum is σ = 512179800. Its totient is φ = 122472000.

The previous prime is 251049373. The next prime is 251049391. The reversal of 251049375 is 573940152.

It is not a de Polignac number, because 251049375 - 2¹ = 251049373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251049371) by changing a digit.

It is a polite number, since it can be written in 139 ways as a sum of consecutive naturals, for example, 8656861 + ... + 8656889.

Almost surely, 2^251049375 is an apocalyptic number.

251049375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

251049375 is an abundant number, since it is smaller than the sum of its proper divisors (261130425).

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

251049375 is an frugal number, since it uses more digits than its factorization.

251049375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 251049375 is about 15844.5377023124. The cubic root of 251049375 is about 630.8407143300.

The spelling of 251049375 in words is "two hundred fifty-one million, forty-nine thousand, three hundred seventy-five".