15641651 has 2 divisors, whose sum is σ = 15641652. Its totient is φ = 15641650.

The previous prime is 15641629. The next prime is 15641653. The reversal of 15641651 is 15614651.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15641651 - 2¹⁰ = 15640627 is a prime.

It is a super-2 number, since 2×15641651² = 489322492011602, which contains 22 as substring.

Together with 15641653, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15641653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7820825 + 7820826.

It is an arithmetic number, because the mean of its divisors is an integer number (7820826).

Almost surely, 2^15641651 is an apocalyptic number.

15641651 is a deficient number, since it is larger than the sum of its proper divisors (1).

15641651 is an equidigital number, since it uses as much as digits as its factorization.

15641651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 29.

The square root of 15641651 is about 3954.9527177958. The cubic root of 15641651 is about 250.0887738064.

Subtracting from 15641651 its reverse (15614651), we obtain a cube (27000 = 30³).

The spelling of 15641651 in words is "fifteen million, six hundred forty-one thousand, six hundred fifty-one".