15172201 has 4 divisors (see below), whose sum is σ = 16551504. Its totient is φ = 13792900.

The previous prime is 15172193. The next prime is 15172231. The reversal of 15172201 is 10227151.

15172201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10227151 = 11 ⋅929741.

It is not a de Polignac number, because 15172201 - 2³ = 15172193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15172231) 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, 689635 + ... + 689656.

It is an arithmetic number, because the mean of its divisors is an integer number (4137876).

Almost surely, 2^15172201 is an apocalyptic number.

15172201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15172201 is a deficient number, since it is larger than the sum of its proper divisors (1379303).

15172201 is a wasteful number, since it uses less digits than its factorization.

15172201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379302.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 15172201 is about 3895.1509598474. The cubic root of 15172201 is about 247.5613615159.

Adding to 15172201 its reverse (10227151), we get a palindrome (25399352).

The spelling of 15172201 in words is "fifteen million, one hundred seventy-two thousand, two hundred one".