251730473 has 2 divisors, whose sum is σ = 251730474. Its totient is φ = 251730472.

The previous prime is 251730467. The next prime is 251730491. The reversal of 251730473 is 374037152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250493929 + 1236544 = 15827^2 + 1112^2 .

It is a cyclic number.

It is not a de Polignac number, because 251730473 - 2⁸ = 251730217 is a prime.

It is not a weakly prime, because it can be changed into another prime (251730463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125865236 + 125865237.

It is an arithmetic number, because the mean of its divisors is an integer number (125865237).

Almost surely, 2^251730473 is an apocalyptic number.

It is an amenable number.

251730473 is a deficient number, since it is larger than the sum of its proper divisors (1).

251730473 is an equidigital number, since it uses as much as digits as its factorization.

251730473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 251730473 is about 15866.0162926930. The cubic root of 251730473 is about 631.4106903530.

The spelling of 251730473 in words is "two hundred fifty-one million, seven hundred thirty thousand, four hundred seventy-three".