15221253 has 8 divisors (see below), whose sum is σ = 20430016. Its totient is φ = 10080000.

The previous prime is 15221251. The next prime is 15221263. The reversal of 15221253 is 35212251.

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

It is not a de Polignac number, because 15221253 - 2¹ = 15221251 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 (15221251) 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, 16348 + ... + 17253.

It is an arithmetic number, because the mean of its divisors is an integer number (2553752).

Almost surely, 2^15221253 is an apocalyptic number.

It is an amenable number.

15221253 is a deficient number, since it is larger than the sum of its proper divisors (5208763).

15221253 is a wasteful number, since it uses less digits than its factorization.

15221253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33755.

The product of its digits is 600, while the sum is 21.

The square root of 15221253 is about 3901.4424255652. The cubic root of 15221253 is about 247.8278646372.

It can be divided in two parts, 1522 and 1253, that added together give a triangular number (2775 = T₇₄).

The spelling of 15221253 in words is "fifteen million, two hundred twenty-one thousand, two hundred fifty-three".