51581083 has 2 divisors, whose sum is σ = 51581084. Its totient is φ = 51581082.

The previous prime is 51581081. The next prime is 51581129. The reversal of 51581083 is 38018515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51581083 - 2¹ = 51581081 is a prime.

Together with 51581081, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51581081) 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, 25790541 + 25790542.

It is an arithmetic number, because the mean of its divisors is an integer number (25790542).

Almost surely, 2^51581083 is an apocalyptic number.

51581083 is a deficient number, since it is larger than the sum of its proper divisors (1).

51581083 is an equidigital number, since it uses as much as digits as its factorization.

51581083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 51581083 is about 7181.9971456413. The cubic root of 51581083 is about 372.2460963607.

Adding to 51581083 its reverse (38018515), we get a palindrome (89599598).

It can be divided in two parts, 5158 and 1083, that added together give a square (6241 = 79²).

The spelling of 51581083 in words is "fifty-one million, five hundred eighty-one thousand, eighty-three".