381251975 has 24 divisors (see below), whose sum is σ = 520977072. Its totient is φ = 274982400.

The previous prime is 381251963. The next prime is 381251977. The reversal of 381251975 is 579152183.

It is not a de Polignac number, because 381251975 - 2²⁸ = 112816519 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381251977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 335 + ... + 27615.

It is an arithmetic number, because the mean of its divisors is an integer number (21707378).

Almost surely, 2^381251975 is an apocalyptic number.

381251975 is a deficient number, since it is larger than the sum of its proper divisors (139725097).

381251975 is a wasteful number, since it uses less digits than its factorization.

381251975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27347 (or 27342 counting only the distinct ones).

The product of its digits is 75600, while the sum is 41.

The square root of 381251975 is about 19525.6747642687. The cubic root of 381251975 is about 725.1102329415.

The spelling of 381251975 in words is "three hundred eighty-one million, two hundred fifty-one thousand, nine hundred seventy-five".