15091651 has 2 divisors, whose sum is σ = 15091652. Its totient is φ = 15091650.

The previous prime is 15091639. The next prime is 15091673. The reversal of 15091651 is 15619051.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15091651 - 2⁵ = 15091619 is a prime.

It is not a weakly prime, because it can be changed into another prime (15091621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7545825 + 7545826.

It is an arithmetic number, because the mean of its divisors is an integer number (7545826).

Almost surely, 2^15091651 is an apocalyptic number.

15091651 is a deficient number, since it is larger than the sum of its proper divisors (1).

15091651 is an equidigital number, since it uses as much as digits as its factorization.

15091651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 15091651 is about 3884.7974207158. The cubic root of 15091651 is about 247.1224785547.

It can be divided in two parts, 1509 and 1651, that added together give a triangular number (3160 = T₇₉).

The spelling of 15091651 in words is "fifteen million, ninety-one thousand, six hundred fifty-one".