15216487 has 16 divisors (see below), whose sum is σ = 18077472. Its totient is φ = 12625920.

The previous prime is 15216463. The next prime is 15216493. The reversal of 15216487 is 78461251.

It is a cyclic number.

It is not a de Polignac number, because 15216487 - 2¹⁵ = 15183719 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 (15216407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13323 + ... + 14419.

It is an arithmetic number, because the mean of its divisors is an integer number (1129842).

Almost surely, 2^15216487 is an apocalyptic number.

15216487 is a deficient number, since it is larger than the sum of its proper divisors (2860985).

15216487 is a wasteful number, since it uses less digits than its factorization.

15216487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218.

The product of its digits is 13440, while the sum is 34.

The square root of 15216487 is about 3900.8315780100. The cubic root of 15216487 is about 247.8019957441.

It can be divided in two parts, 152164 and 87, that added together give a palindrome (152251).

The spelling of 15216487 in words is "fifteen million, two hundred sixteen thousand, four hundred eighty-seven".