15241321992 has 32 divisors (see below), whose sum is σ = 41034329280. Its totient is φ = 4689637440.

The previous prime is 15241321981. The next prime is 15241321993. The reversal of 15241321992 is 29912314251.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 15241321992.

It is not an unprimeable number, because it can be changed into a prime (15241321993) 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, 24424884 + ... + 24425507.

It is an arithmetic number, because the mean of its divisors is an integer number (1282322790).

Almost surely, 2^15241321992 is an apocalyptic number.

15241321992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15241321992 is an abundant number, since it is smaller than the sum of its proper divisors (25793007288).

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

15241321992 is a wasteful number, since it uses less digits than its factorization.

15241321992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48850413 (or 48850409 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The spelling of 15241321992 in words is "fifteen billion, two hundred forty-one million, three hundred twenty-one thousand, nine hundred ninety-two".