381358251 has 6 divisors (see below), whose sum is σ = 550850820. Its totient is φ = 254238828.

The previous prime is 381358231. The next prime is 381358277. The reversal of 381358251 is 152853183.

It is not a de Polignac number, because 381358251 - 2²³ = 372969643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381358231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21186561 + ... + 21186578.

It is an arithmetic number, because the mean of its divisors is an integer number (91808470).

Almost surely, 2^381358251 is an apocalyptic number.

381358251 is a deficient number, since it is larger than the sum of its proper divisors (169492569).

381358251 is a wasteful number, since it uses less digits than its factorization.

381358251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42373145 (or 42373142 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 381358251 is about 19528.3960170824. The cubic root of 381358251 is about 725.1776027833.

The spelling of 381358251 in words is "three hundred eighty-one million, three hundred fifty-eight thousand, two hundred fifty-one".