251172941 has 2 divisors, whose sum is σ = 251172942. Its totient is φ = 251172940.

The previous prime is 251172931. The next prime is 251172953. The reversal of 251172941 is 149271152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244797316 + 6375625 = 15646^2 + 2525^2 .

It is a cyclic number.

It is not a de Polignac number, because 251172941 - 2¹⁰ = 251171917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251172898 and 251172907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251172931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125586470 + 125586471.

It is an arithmetic number, because the mean of its divisors is an integer number (125586471).

Almost surely, 2^251172941 is an apocalyptic number.

It is an amenable number.

251172941 is a deficient number, since it is larger than the sum of its proper divisors (1).

251172941 is an equidigital number, since it uses as much as digits as its factorization.

251172941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 32.

The square root of 251172941 is about 15848.4365474958. The cubic root of 251172941 is about 630.9441968663.

The spelling of 251172941 in words is "two hundred fifty-one million, one hundred seventy-two thousand, nine hundred forty-one".