15613161 has 4 divisors (see below), whose sum is σ = 20817552. Its totient is φ = 10408772.

The previous prime is 15613151. The next prime is 15613177. The reversal of 15613161 is 16131651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15613161 - 2⁷ = 15613033 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15613141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2602191 + ... + 2602196.

It is an arithmetic number, because the mean of its divisors is an integer number (5204388).

Almost surely, 2^15613161 is an apocalyptic number.

It is an amenable number.

15613161 is a deficient number, since it is larger than the sum of its proper divisors (5204391).

15613161 is an equidigital number, since it uses as much as digits as its factorization.

15613161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5204390.

The product of its digits is 540, while the sum is 24.

The square root of 15613161 is about 3951.3492632264. The cubic root of 15613161 is about 249.9368427126.

The spelling of 15613161 in words is "fifteen million, six hundred thirteen thousand, one hundred sixty-one".