251673941 has 2 divisors, whose sum is σ = 251673942. Its totient is φ = 251673940.

The previous prime is 251673937. The next prime is 251673953. The reversal of 251673941 is 149376152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236236900 + 15437041 = 15370^2 + 3929^2 .

It is a cyclic number.

It is not a de Polignac number, because 251673941 - 2² = 251673937 is a prime.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 251673895 and 251673904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251673241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125836970 + 125836971.

It is an arithmetic number, because the mean of its divisors is an integer number (125836971).

Almost surely, 2^251673941 is an apocalyptic number.

It is an amenable number.

251673941 is a deficient number, since it is larger than the sum of its proper divisors (1).

251673941 is an equidigital number, since it uses as much as digits as its factorization.

251673941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 251673941 is about 15864.2346490463. The cubic root of 251673941 is about 631.3634207726.

The spelling of 251673941 in words is "two hundred fifty-one million, six hundred seventy-three thousand, nine hundred forty-one".