251130454 has 4 divisors (see below), whose sum is σ = 376695684. Its totient is φ = 125565226.

The previous prime is 251130437. The next prime is 251130457. The reversal of 251130454 is 454031152.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×251130454² = 126133009852492232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251130457) 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 as a sum of consecutive naturals, namely, 62782612 + ... + 62782615.

It is an arithmetic number, because the mean of its divisors is an integer number (94173921).

Almost surely, 2^251130454 is an apocalyptic number.

251130454 is a deficient number, since it is larger than the sum of its proper divisors (125565230).

251130454 is a wasteful number, since it uses less digits than its factorization.

251130454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125565229.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 251130454 is about 15847.0960746756. The cubic root of 251130454 is about 630.9086192046.

The spelling of 251130454 in words is "two hundred fifty-one million, one hundred thirty thousand, four hundred fifty-four".