251368463 has 4 divisors (see below), whose sum is σ = 251592240. Its totient is φ = 251144688.

The previous prime is 251368457. The next prime is 251368487. The reversal of 251368463 is 364863152.

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

It is a cyclic number.

It is not a de Polignac number, because 251368463 - 2⁶ = 251368399 is a prime.

It is a super-2 number, since 2×251368463² = 126372208381964738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251368063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110195 + ... + 112452.

It is an arithmetic number, because the mean of its divisors is an integer number (62898060).

Almost surely, 2^251368463 is an apocalyptic number.

251368463 is a deficient number, since it is larger than the sum of its proper divisors (223777).

251368463 is a wasteful number, since it uses less digits than its factorization.

251368463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223776.

The product of its digits is 103680, while the sum is 38.

The square root of 251368463 is about 15854.6038424175. The cubic root of 251368463 is about 631.1078709128.

The spelling of 251368463 in words is "two hundred fifty-one million, three hundred sixty-eight thousand, four hundred sixty-three".