51424531 has 2 divisors, whose sum is σ = 51424532. Its totient is φ = 51424530.

The previous prime is 51424523. The next prime is 51424543. The reversal of 51424531 is 13542415.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51424531 - 2³ = 51424523 is a prime.

It is a super-2 number, since 2×51424531² = 5288964777139922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51424496 and 51424505.

It is not a weakly prime, because it can be changed into another prime (51424591) 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, 25712265 + 25712266.

It is an arithmetic number, because the mean of its divisors is an integer number (25712266).

Almost surely, 2^51424531 is an apocalyptic number.

51424531 is a deficient number, since it is larger than the sum of its proper divisors (1).

51424531 is an equidigital number, since it uses as much as digits as its factorization.

51424531 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 51424531 is about 7171.0899450502. The cubic root of 51424531 is about 371.8691175399.

Adding to 51424531 its reverse (13542415), we get a palindrome (64966946).

The spelling of 51424531 in words is "fifty-one million, four hundred twenty-four thousand, five hundred thirty-one".