15697161 has 12 divisors (see below), whose sum is σ = 22757488. Its totient is φ = 10426104.

The previous prime is 15697159. The next prime is 15697181. The reversal of 15697161 is 16179651.

It is a happy number.

15697161 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15697161 - 2¹ = 15697159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15697111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 535 + ... + 5628.

Almost surely, 2^15697161 is an apocalyptic number.

It is an amenable number.

15697161 is a deficient number, since it is larger than the sum of its proper divisors (7060327).

15697161 is a wasteful number, since it uses less digits than its factorization.

15697161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6452 (or 6449 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 15697161 is about 3961.9642855533. The cubic root of 15697161 is about 250.3842677173.

The spelling of 15697161 in words is "fifteen million, six hundred ninety-seven thousand, one hundred sixty-one".