51425431 has 2 divisors, whose sum is σ = 51425432. Its totient is φ = 51425430.

The previous prime is 51425417. The next prime is 51425441. The reversal of 51425431 is 13452415.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51425431 - 2²³ = 43036823 is a prime.

It is a super-2 number, since 2×51425431² = 5289149907071522, which contains 22 as substring.

It is equal to p_3081472 and since 51425431 and 3081472 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 51425396 and 51425405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51425441) 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, 25712715 + 25712716.

It is an arithmetic number, because the mean of its divisors is an integer number (25712716).

Almost surely, 2^51425431 is an apocalyptic number.

51425431 is a deficient number, since it is larger than the sum of its proper divisors (1).

51425431 is an equidigital number, since it uses as much as digits as its factorization.

51425431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 25.

The square root of 51425431 is about 7171.1526967427. The cubic root of 51425431 is about 371.8712869342.

Adding to 51425431 its reverse (13452415), we get a palindrome (64877846).

The spelling of 51425431 in words is "fifty-one million, four hundred twenty-five thousand, four hundred thirty-one".