15531242200 has 192 divisors, whose sum is σ = 40159929600. Its totient is φ = 5559206400.

The previous prime is 15531242191. The next prime is 15531242201. The reversal of 15531242200 is 224213551.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15531242201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7253130 + ... + 7255270.

It is an arithmetic number, because the mean of its divisors is an integer number (209166300).

Almost surely, 2^15531242200 is an apocalyptic number.

15531242200 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 15531242200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20079964800).

15531242200 is an abundant number, since it is smaller than the sum of its proper divisors (24628687400).

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

15531242200 is a wasteful number, since it uses less digits than its factorization.

15531242200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2282 (or 2273 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 15531242200 its reverse (224213551), we get a palindrome (15755455751).

The spelling of 15531242200 in words is "fifteen billion, five hundred thirty-one million, two hundred forty-two thousand, two hundred".