251484479 has 2 divisors, whose sum is σ = 251484480. Its totient is φ = 251484478.

The previous prime is 251484421. The next prime is 251484503. The reversal of 251484479 is 974484152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251484479 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251484979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125742239 + 125742240.

It is an arithmetic number, because the mean of its divisors is an integer number (125742240).

Almost surely, 2^251484479 is an apocalyptic number.

251484479 is a deficient number, since it is larger than the sum of its proper divisors (1).

251484479 is an equidigital number, since it uses as much as digits as its factorization.

251484479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 44.

The square root of 251484479 is about 15858.2621683462. The cubic root of 251484479 is about 631.2049493190.

The spelling of 251484479 in words is "two hundred fifty-one million, four hundred eighty-four thousand, four hundred seventy-nine".