51615035393 has 2 divisors, whose sum is σ = 51615035394. Its totient is φ = 51615035392.

The previous prime is 51615035383. The next prime is 51615035411. The reversal of 51615035393 is 39353051615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29760735169 + 21854300224 = 172513^2 + 147832^2 .

It is a cyclic number.

It is not a de Polignac number, because 51615035393 - 2³² = 47320068097 is a prime.

It is a super-2 number, since 2×51615035393² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51615035393.

It is not a weakly prime, because it can be changed into another prime (51615035383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25807517696 + 25807517697.

It is an arithmetic number, because the mean of its divisors is an integer number (25807517697).

Almost surely, 2^51615035393 is an apocalyptic number.

It is an amenable number.

51615035393 is a deficient number, since it is larger than the sum of its proper divisors (1).

51615035393 is an equidigital number, since it uses as much as digits as its factorization.

51615035393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 182250, while the sum is 41.

The spelling of 51615035393 in words is "fifty-one billion, six hundred fifteen million, thirty-five thousand, three hundred ninety-three".