251423443031 has 2 divisors, whose sum is σ = 251423443032. Its totient is φ = 251423443030.

The previous prime is 251423443027. The next prime is 251423443087. The reversal of 251423443031 is 130344324152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251423443031 - 2² = 251423443027 is a prime.

It is a super-2 number, since 2×251423443031² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251423443001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125711721515 + 125711721516.

It is an arithmetic number, because the mean of its divisors is an integer number (125711721516).

Almost surely, 2^251423443031 is an apocalyptic number.

251423443031 is a deficient number, since it is larger than the sum of its proper divisors (1).

251423443031 is an equidigital number, since it uses as much as digits as its factorization.

251423443031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 251423443031 its reverse (130344324152), we get a palindrome (381767767183).

The spelling of 251423443031 in words is "two hundred fifty-one billion, four hundred twenty-three million, four hundred forty-three thousand, thirty-one".