51031423 has 2 divisors, whose sum is σ = 51031424. Its totient is φ = 51031422.

The previous prime is 51031391. The next prime is 51031439. The reversal of 51031423 is 32413015.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51031423 - 2⁵ = 51031391 is a prime.

It is a super-2 number, since 2×51031423² = 5208412266809858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51031423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51031483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25515711 + 25515712.

It is an arithmetic number, because the mean of its divisors is an integer number (25515712).

Almost surely, 2^51031423 is an apocalyptic number.

51031423 is a deficient number, since it is larger than the sum of its proper divisors (1).

51031423 is an equidigital number, since it uses as much as digits as its factorization.

51031423 is an evil number, because the sum of its binary digits is even.

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

The square root of 51031423 is about 7143.6281398180. The cubic root of 51031423 is about 370.9191246809.

Adding to 51031423 its reverse (32413015), we get a palindrome (83444438).

The spelling of 51031423 in words is "fifty-one million, thirty-one thousand, four hundred twenty-three".