15213132 has 72 divisors (see below), whose sum is σ = 43020432. Its totient is φ = 4492800.

The previous prime is 15213119. The next prime is 15213137. The reversal of 15213132 is 23131251.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (15213137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15768 + ... + 16704.

It is an arithmetic number, because the mean of its divisors is an integer number (597506).

Almost surely, 2^15213132 is an apocalyptic number.

15213132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15213132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21510216).

15213132 is an abundant number, since it is smaller than the sum of its proper divisors (27807300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15213132 is a wasteful number, since it uses less digits than its factorization.

15213132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999 (or 994 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 15213132 is about 3900.4015177928. The cubic root of 15213132 is about 247.7837822365.

Adding to 15213132 its reverse (23131251), we get a palindrome (38344383).

The spelling of 15213132 in words is "fifteen million, two hundred thirteen thousand, one hundred thirty-two".