51392531 has 2 divisors, whose sum is σ = 51392532. Its totient is φ = 51392530.

The previous prime is 51392507. The next prime is 51392533. The reversal of 51392531 is 13529315.

51392531 is nontrivially palindromic in base 4 and base 16.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51392531 - 2¹⁰ = 51391507 is a prime.

It is a super-2 number, since 2×51392531² = 5282384485171922, which contains 22 as substring.

Together with 51392533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51392494 and 51392503.

It is not a weakly prime, because it can be changed into another prime (51392533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25696265 + 25696266.

It is an arithmetic number, because the mean of its divisors is an integer number (25696266).

Almost surely, 2^51392531 is an apocalyptic number.

51392531 is a deficient number, since it is larger than the sum of its proper divisors (1).

51392531 is an equidigital number, since it uses as much as digits as its factorization.

51392531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4050, while the sum is 29.

The square root of 51392531 is about 7168.8584167913. The cubic root of 51392531 is about 371.7919670653.

The spelling of 51392531 in words is "fifty-one million, three hundred ninety-two thousand, five hundred thirty-one".