51631651 has 2 divisors, whose sum is σ = 51631652. Its totient is φ = 51631650.

The previous prime is 51631649. The next prime is 51631661. The reversal of 51631651 is 15613615.

51631651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51631651 - 2¹ = 51631649 is a prime.

Together with 51631649, it forms a pair of twin primes.

It is equal to p_3093076 and since 51631651 and 3093076 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (51631661) 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, 25815825 + 25815826.

It is an arithmetic number, because the mean of its divisors is an integer number (25815826).

Almost surely, 2^51631651 is an apocalyptic number.

51631651 is a deficient number, since it is larger than the sum of its proper divisors (1).

51631651 is an equidigital number, since it uses as much as digits as its factorization.

51631651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 28.

The square root of 51631651 is about 7185.5167524681. The cubic root of 51631651 is about 372.3677016179.

The spelling of 51631651 in words is "fifty-one million, six hundred thirty-one thousand, six hundred fifty-one".