51633121237 has 2 divisors, whose sum is σ = 51633121238. Its totient is φ = 51633121236.

The previous prime is 51633121229. The next prime is 51633121249. The reversal of 51633121237 is 73212133615.

51633121237 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 can be written as a sum of positive squares in only one way, i.e., 47989912356 + 3643208881 = 219066^2 + 60359^2 .

It is a cyclic number.

It is not a de Polignac number, because 51633121237 - 2³ = 51633121229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51633121297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25816560618 + 25816560619.

It is an arithmetic number, because the mean of its divisors is an integer number (25816560619).

Almost surely, 2^51633121237 is an apocalyptic number.

It is an amenable number.

51633121237 is a deficient number, since it is larger than the sum of its proper divisors (1).

51633121237 is an equidigital number, since it uses as much as digits as its factorization.

51633121237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 34.

The spelling of 51633121237 in words is "fifty-one billion, six hundred thirty-three million, one hundred twenty-one thousand, two hundred thirty-seven".