15055231440 has 160 divisors (see below), whose sum is σ = 48906798336. Its totient is φ = 3823902720.

The previous prime is 15055231427. The next prime is 15055231459. The reversal of 15055231440 is 4413255051.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 15055231398 and 15055231407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1324662 + ... + 1335978.

Almost surely, 2^15055231440 is an apocalyptic number.

15055231440 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 15055231440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24453399168).

15055231440 is an abundant number, since it is smaller than the sum of its proper divisors (33851566896).

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

15055231440 is a wasteful number, since it uses less digits than its factorization.

15055231440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11597 (or 11591 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 15055231440 its reverse (4413255051), we get a palindrome (19468486491).

The spelling of 15055231440 in words is "fifteen billion, fifty-five million, two hundred thirty-one thousand, four hundred forty".