15115651 has 2 divisors, whose sum is σ = 15115652. Its totient is φ = 15115650.

The previous prime is 15115649. The next prime is 15115679. The reversal of 15115651 is 15651151.

15115651 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 is a cyclic number.

It is not a de Polignac number, because 15115651 - 2¹ = 15115649 is a prime.

Together with 15115649, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (15115691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7557825 + 7557826.

It is an arithmetic number, because the mean of its divisors is an integer number (7557826).

Almost surely, 2^15115651 is an apocalyptic number.

15115651 is a deficient number, since it is larger than the sum of its proper divisors (1).

15115651 is an equidigital number, since it uses as much as digits as its factorization.

15115651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 750, while the sum is 25.

The square root of 15115651 is about 3887.8851577689. The cubic root of 15115651 is about 247.2534074217.

The spelling of 15115651 in words is "fifteen million, one hundred fifteen thousand, six hundred fifty-one".