15229989 has 6 divisors (see below), whose sum is σ = 21998886. Its totient is φ = 10153320.

The previous prime is 15229987. The next prime is 15229999. The reversal of 15229989 is 98992251.

It can be written as a sum of positive squares in only one way, i.e., 12852225 + 2377764 = 3585^2 + 1542^2 .

It is not a de Polignac number, because 15229989 - 2¹ = 15229987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15229987) 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, 846102 + ... + 846119.

It is an arithmetic number, because the mean of its divisors is an integer number (3666481).

Almost surely, 2^15229989 is an apocalyptic number.

It is an amenable number.

15229989 is a deficient number, since it is larger than the sum of its proper divisors (6768897).

15229989 is a wasteful number, since it uses less digits than its factorization.

15229989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692227 (or 1692224 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 15229989 is about 3902.5618508872. The cubic root of 15229989 is about 247.8752678780.

It can be divided in two parts, 1522 and 9989, that added together give a palindrome (11511).

The spelling of 15229989 in words is "fifteen million, two hundred twenty-nine thousand, nine hundred eighty-nine".