16391157 has 32 divisors (see below), whose sum is σ = 24084480. Its totient is φ = 9884160.

The previous prime is 16391153. The next prime is 16391159. The reversal of 16391157 is 75119361.

It is a happy number.

It is not a de Polignac number, because 16391157 - 2² = 16391153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16391153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168933 + ... + 169029.

It is an arithmetic number, because the mean of its divisors is an integer number (752640).

Almost surely, 2^16391157 is an apocalyptic number.

It is an amenable number.

16391157 is a deficient number, since it is larger than the sum of its proper divisors (7693323).

16391157 is a wasteful number, since it uses less digits than its factorization.

16391157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233.

The product of its digits is 5670, while the sum is 33.

The square root of 16391157 is about 4048.5993874425. The cubic root of 16391157 is about 254.0211454486.

The spelling of 16391157 in words is "sixteen million, three hundred ninety-one thousand, one hundred fifty-seven".