51414431 has 2 divisors, whose sum is σ = 51414432. Its totient is φ = 51414430.

The previous prime is 51414427. The next prime is 51414449. The reversal of 51414431 is 13441415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51414431 - 2² = 51414427 is a prime.

It is a super-2 number, since 2×51414431² = 5286887430107522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 51414397 and 51414406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51414401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25707215 + 25707216.

It is an arithmetic number, because the mean of its divisors is an integer number (25707216).

Almost surely, 2^51414431 is an apocalyptic number.

51414431 is a deficient number, since it is larger than the sum of its proper divisors (1).

51414431 is an equidigital number, since it uses as much as digits as its factorization.

51414431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 51414431 is about 7170.3856939498. The cubic root of 51414431 is about 371.8447703789.

Adding to 51414431 its reverse (13441415), we get a palindrome (64855846).

The spelling of 51414431 in words is "fifty-one million, four hundred fourteen thousand, four hundred thirty-one".