15957161 has 4 divisors (see below), whose sum is σ = 17407824. Its totient is φ = 14506500.

The previous prime is 15957133. The next prime is 15957181. The reversal of 15957161 is 16175951.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-15957161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15957121) 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, 725315 + ... + 725336.

It is an arithmetic number, because the mean of its divisors is an integer number (4351956).

Almost surely, 2^15957161 is an apocalyptic number.

15957161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15957161 is a deficient number, since it is larger than the sum of its proper divisors (1450663).

15957161 is a wasteful number, since it uses less digits than its factorization.

15957161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450662.

The product of its digits is 9450, while the sum is 35.

The square root of 15957161 is about 3994.6415358578. The cubic root of 15957161 is about 251.7591183119.

The spelling of 15957161 in words is "fifteen million, nine hundred fifty-seven thousand, one hundred sixty-one".