15503353140 has 96 divisors (see below), whose sum is σ = 47386684800. Its totient is φ = 3755929600.

The previous prime is 15503353093. The next prime is 15503353237. The reversal of 15503353140 is 4135330551.

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 = 15503353098 and 15503353107.

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, 1129036 + ... + 1142684.

It is an arithmetic number, because the mean of its divisors is an integer number (493611300).

Almost surely, 2^15503353140 is an apocalyptic number.

15503353140 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 15503353140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23693342400).

15503353140 is an abundant number, since it is smaller than the sum of its proper divisors (31883331660).

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

15503353140 is a wasteful number, since it uses less digits than its factorization.

15503353140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15393 (or 15391 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 30.

Adding to 15503353140 its reverse (4135330551), we get a palindrome (19638683691).

The spelling of 15503353140 in words is "fifteen billion, five hundred three million, three hundred fifty-three thousand, one hundred forty".