251012473 has 2 divisors, whose sum is σ = 251012474. Its totient is φ = 251012472.

The previous prime is 251012459. The next prime is 251012479. The reversal of 251012473 is 374210152.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190219264 + 60793209 = 13792^2 + 7797^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251012473 is a prime.

It is not a weakly prime, because it can be changed into another prime (251012479) 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 as a sum of consecutive naturals, namely, 125506236 + 125506237.

It is an arithmetic number, because the mean of its divisors is an integer number (125506237).

Almost surely, 2^251012473 is an apocalyptic number.

It is an amenable number.

251012473 is a deficient number, since it is larger than the sum of its proper divisors (1).

251012473 is an equidigital number, since it uses as much as digits as its factorization.

251012473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 251012473 is about 15843.3731572541. The cubic root of 251012473 is about 630.8098035118.

The spelling of 251012473 in words is "two hundred fifty-one million, twelve thousand, four hundred seventy-three".