1515115535551 has 2 divisors, whose sum is σ = 1515115535552. Its totient is φ = 1515115535550.

The previous prime is 1515115535501. The next prime is 1515115535597. The reversal of 1515115535551 is 1555355115151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1515115535551 - 2⁹ = 1515115535039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1515115535498 and 1515115535507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1515115535501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 757557767775 + 757557767776.

It is an arithmetic number, because the mean of its divisors is an integer number (757557767776).

Almost surely, 2^{1515115535551} is an apocalyptic number.

1515115535551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1515115535551 is an equidigital number, since it uses as much as digits as its factorization.

1515115535551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 234375, while the sum is 43.

The spelling of 1515115535551 in words is "one trillion, five hundred fifteen billion, one hundred fifteen million, five hundred thirty-five thousand, five hundred fifty-one".