251424487 has 2 divisors, whose sum is σ = 251424488. Its totient is φ = 251424486.

The previous prime is 251424463. The next prime is 251424521. The reversal of 251424487 is 784424152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251424487 - 2²³ = 243035879 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251422487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125712243 + 125712244.

It is an arithmetic number, because the mean of its divisors is an integer number (125712244).

Almost surely, 2^251424487 is an apocalyptic number.

251424487 is a deficient number, since it is larger than the sum of its proper divisors (1).

251424487 is an equidigital number, since it uses as much as digits as its factorization.

251424487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71680, while the sum is 37.

The square root of 251424487 is about 15856.3705494038. The cubic root of 251424487 is about 631.1547536980.

The spelling of 251424487 in words is "two hundred fifty-one million, four hundred twenty-four thousand, four hundred eighty-seven".