251232011 has 2 divisors, whose sum is σ = 251232012. Its totient is φ = 251232010.

The previous prime is 251231993. The next prime is 251232053. The reversal of 251232011 is 110232152.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251232011 - 2¹⁸ = 250969867 is a prime.

It is a super-2 number, since 2×251232011² = 126235046702208242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (251232211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125616005 + 125616006.

It is an arithmetic number, because the mean of its divisors is an integer number (125616006).

Almost surely, 2^251232011 is an apocalyptic number.

251232011 is a deficient number, since it is larger than the sum of its proper divisors (1).

251232011 is an equidigital number, since it uses as much as digits as its factorization.

251232011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 251232011 is about 15850.3000287061. The cubic root of 251232011 is about 630.9936540945.

Adding to 251232011 its reverse (110232152), we get a palindrome (361464163).

The spelling of 251232011 in words is "two hundred fifty-one million, two hundred thirty-two thousand, eleven".