15231000 has 64 divisors (see below), whose sum is σ = 47530080. Its totient is φ = 4060800.

The previous prime is 15230947. The next prime is 15231001. The reversal of 15231000 is 13251.

It is a super-2 number, since 2×15231000² = 463966722000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15231001) 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, 462 + ... + 5538.

Almost surely, 2^15231000 is an apocalyptic number.

15231000 is a gapful number since it is divisible by the number (10) 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 15231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23765040).

15231000 is an abundant number, since it is smaller than the sum of its proper divisors (32299080).

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

15231000 is a wasteful number, since it uses less digits than its factorization.

15231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5101 (or 5087 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 15231000 is about 3902.6913790358. The cubic root of 15231000 is about 247.8807525909.

Adding to 15231000 its reverse (13251), we get a palindrome (15244251).

The spelling of 15231000 in words is "fifteen million, two hundred thirty-one thousand".