51432013 has 2 divisors, whose sum is σ = 51432014. Its totient is φ = 51432012.

The previous prime is 51432001. The next prime is 51432023. The reversal of 51432013 is 31023415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30437289 + 20994724 = 5517^2 + 4582^2 .

It is a cyclic number.

It is not a de Polignac number, because 51432013 - 2²¹ = 49334861 is a prime.

It is a super-2 number, since 2×51432013² = 5290503922464338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51432023) 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, 25716006 + 25716007.

It is an arithmetic number, because the mean of its divisors is an integer number (25716007).

Almost surely, 2^51432013 is an apocalyptic number.

It is an amenable number.

51432013 is a deficient number, since it is larger than the sum of its proper divisors (1).

51432013 is an equidigital number, since it uses as much as digits as its factorization.

51432013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 51432013 is about 7171.6116040957. The cubic root of 51432013 is about 371.8871516685.

Adding to 51432013 its reverse (31023415), we get a palindrome (82455428).

The spelling of 51432013 in words is "fifty-one million, four hundred thirty-two thousand, thirteen".