51658531 has 2 divisors, whose sum is σ = 51658532. Its totient is φ = 51658530.

The previous prime is 51658513. The next prime is 51658543. The reversal of 51658531 is 13585615.

51658531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (51658513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51658531 - 2⁷ = 51658403 is a prime.

It is a super-2 number, since 2×51658531² = 5337207650155922, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 51658531 parts by 10164 straight cuts.

It is not a weakly prime, because it can be changed into another prime (51658331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25829265 + 25829266.

It is an arithmetic number, because the mean of its divisors is an integer number (25829266).

Almost surely, 2^51658531 is an apocalyptic number.

51658531 is a deficient number, since it is larger than the sum of its proper divisors (1).

51658531 is an equidigital number, since it uses as much as digits as its factorization.

51658531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 34.

The square root of 51658531 is about 7187.3869382412. The cubic root of 51658531 is about 372.4323099680.

The spelling of 51658531 in words is "fifty-one million, six hundred fifty-eight thousand, five hundred thirty-one".