51149737 has 2 divisors, whose sum is σ = 51149738. Its totient is φ = 51149736.

The previous prime is 51149731. The next prime is 51149741. The reversal of 51149737 is 73794115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44368921 + 6780816 = 6661^2 + 2604^2 .

It is a cyclic number.

It is not a de Polignac number, because 51149737 - 2²³ = 42761129 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51149696 and 51149705.

It is not a weakly prime, because it can be changed into another prime (51149731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25574868 + 25574869.

It is an arithmetic number, because the mean of its divisors is an integer number (25574869).

Almost surely, 2^51149737 is an apocalyptic number.

It is an amenable number.

51149737 is a deficient number, since it is larger than the sum of its proper divisors (1).

51149737 is an equidigital number, since it uses as much as digits as its factorization.

51149737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 37.

The square root of 51149737 is about 7151.9044316881. The cubic root of 51149737 is about 371.2055563949.

The spelling of 51149737 in words is "fifty-one million, one hundred forty-nine thousand, seven hundred thirty-seven".