251268463 has 2 divisors, whose sum is σ = 251268464. Its totient is φ = 251268462.

The previous prime is 251268419. The next prime is 251268481. The reversal of 251268463 is 364862152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251268463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251268163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125634231 + 125634232.

It is an arithmetic number, because the mean of its divisors is an integer number (125634232).

Almost surely, 2^251268463 is an apocalyptic number.

251268463 is a deficient number, since it is larger than the sum of its proper divisors (1).

251268463 is an equidigital number, since it uses as much as digits as its factorization.

251268463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 37.

The square root of 251268463 is about 15851.4498705954. The cubic root of 251268463 is about 631.0241702009.

The spelling of 251268463 in words is "two hundred fifty-one million, two hundred sixty-eight thousand, four hundred sixty-three".