51519497 has 2 divisors, whose sum is σ = 51519498. Its totient is φ = 51519496.

The previous prime is 51519491. The next prime is 51519509. The reversal of 51519497 is 79491515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31125241 + 20394256 = 5579^2 + 4516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51519497 is a prime.

It is a super-2 number, since 2×51519497² = 5308517142266018, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51519491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25759748 + 25759749.

It is an arithmetic number, because the mean of its divisors is an integer number (25759749).

Almost surely, 2^51519497 is an apocalyptic number.

It is an amenable number.

51519497 is a deficient number, since it is larger than the sum of its proper divisors (1).

51519497 is an equidigital number, since it uses as much as digits as its factorization.

51519497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 41.

The square root of 51519497 is about 7177.7083390174. The cubic root of 51519497 is about 372.0978877749.

The spelling of 51519497 in words is "fifty-one million, five hundred nineteen thousand, four hundred ninety-seven".