51525631 has 2 divisors, whose sum is σ = 51525632. Its totient is φ = 51525630.

The previous prime is 51525599. The next prime is 51525637. The reversal of 51525631 is 13652515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51525631 - 2⁵ = 51525599 is a prime.

It is a super-2 number, since 2×51525631² = 5309781299896322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51525631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51525637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25762815 + 25762816.

It is an arithmetic number, because the mean of its divisors is an integer number (25762816).

Almost surely, 2^51525631 is an apocalyptic number.

51525631 is a deficient number, since it is larger than the sum of its proper divisors (1).

51525631 is an equidigital number, since it uses as much as digits as its factorization.

51525631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4500, while the sum is 28.

The square root of 51525631 is about 7178.1356214549. The cubic root of 51525631 is about 372.1126547272.

The spelling of 51525631 in words is "fifty-one million, five hundred twenty-five thousand, six hundred thirty-one".