15272191 has 4 divisors (see below), whose sum is σ = 16660584. Its totient is φ = 13883800.

The previous prime is 15272189. The next prime is 15272197. The reversal of 15272191 is 19127251.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15272191 - 2¹ = 15272189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15272197) 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, 694180 + ... + 694201.

It is an arithmetic number, because the mean of its divisors is an integer number (4165146).

Almost surely, 2^15272191 is an apocalyptic number.

15272191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15272191 is a deficient number, since it is larger than the sum of its proper divisors (1388393).

15272191 is a wasteful number, since it uses less digits than its factorization.

15272191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388392.

The product of its digits is 1260, while the sum is 28.

The square root of 15272191 is about 3907.9650714918. The cubic root of 15272191 is about 248.1040092262.

The spelling of 15272191 in words is "fifteen million, two hundred seventy-two thousand, one hundred ninety-one".