15221043 has 6 divisors (see below), whose sum is σ = 21985964. Its totient is φ = 10147356.

The previous prime is 15221039. The next prime is 15221053. The reversal of 15221043 is 34012251.

It is not a de Polignac number, because 15221043 - 2² = 15221039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15221053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 845605 + ... + 845622.

Almost surely, 2^15221043 is an apocalyptic number.

15221043 is a deficient number, since it is larger than the sum of its proper divisors (6764921).

15221043 is a wasteful number, since it uses less digits than its factorization.

15221043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691233 (or 1691230 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 15221043 is about 3901.4155123493. The cubic root of 15221043 is about 247.8267249130.

Adding to 15221043 its reverse (34012251), we get a palindrome (49233294).

The spelling of 15221043 in words is "fifteen million, two hundred twenty-one thousand, forty-three".