15172197 has 8 divisors (see below), whose sum is σ = 20311200. Its totient is φ = 10074000.

The previous prime is 15172193. The next prime is 15172231. The reversal of 15172197 is 79127151.

15172197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15172197 - 2² = 15172193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15172193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9322 + ... + 10827.

It is an arithmetic number, because the mean of its divisors is an integer number (2538900).

Almost surely, 2^15172197 is an apocalyptic number.

It is an amenable number.

15172197 is a deficient number, since it is larger than the sum of its proper divisors (5139003).

15172197 is a wasteful number, since it uses less digits than its factorization.

15172197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20403.

The product of its digits is 4410, while the sum is 33.

The square root of 15172197 is about 3895.1504463884. The cubic root of 15172197 is about 247.5613397602.

The spelling of 15172197 in words is "fifteen million, one hundred seventy-two thousand, one hundred ninety-seven".