251216463 has 16 divisors (see below), whose sum is σ = 355090176. Its totient is φ = 157434240.

The previous prime is 251216453. The next prime is 251216479. The reversal of 251216463 is 364612152.

It is not a de Polignac number, because 251216463 - 2⁴ = 251216447 is a prime.

It is a super-2 number, since 2×251216463² = 126219422564460738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 251216463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251216453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47628 + ... + 52638.

It is an arithmetic number, because the mean of its divisors is an integer number (22193136).

Almost surely, 2^251216463 is an apocalyptic number.

251216463 is a deficient number, since it is larger than the sum of its proper divisors (103873713).

251216463 is a wasteful number, since it uses less digits than its factorization.

251216463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6014.

The product of its digits is 8640, while the sum is 30.

The square root of 251216463 is about 15849.8095572155. The cubic root of 251216463 is about 630.9806370541.

The spelling of 251216463 in words is "two hundred fifty-one million, two hundred sixteen thousand, four hundred sixty-three".