51982531 has 2 divisors, whose sum is σ = 51982532. Its totient is φ = 51982530.

The previous prime is 51982523. The next prime is 51982561. The reversal of 51982531 is 13528915.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51982531 - 2³ = 51982523 is a prime.

It is a super-2 number, since 2×51982531² = 5404367058331922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51982501) 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, 25991265 + 25991266.

It is an arithmetic number, because the mean of its divisors is an integer number (25991266).

Almost surely, 2^51982531 is an apocalyptic number.

51982531 is a deficient number, since it is larger than the sum of its proper divisors (1).

51982531 is an equidigital number, since it uses as much as digits as its factorization.

51982531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 34.

The square root of 51982531 is about 7209.8911919668. The cubic root of 51982531 is about 373.2093140533.

The spelling of 51982531 in words is "fifty-one million, nine hundred eighty-two thousand, five hundred thirty-one".