515103112040 has 128 divisors (see below), whose sum is σ = 1320306635520. Its totient is φ = 179031705600.

The previous prime is 515103112021. The next prime is 515103112169. The reversal of 515103112040 is 40211301515.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 515103111997 and 515103112015.

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, 13957292 + ... + 13994148.

It is an arithmetic number, because the mean of its divisors is an integer number (10314895590).

Almost surely, 2^515103112040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 515103112040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660153317760).

515103112040 is an abundant number, since it is smaller than the sum of its proper divisors (805203523480).

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

515103112040 is a wasteful number, since it uses less digits than its factorization.

515103112040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38283 (or 38279 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 515103112040 its reverse (40211301515), we get a palindrome (555314413555).

The spelling of 515103112040 in words is "five hundred fifteen billion, one hundred three million, one hundred twelve thousand, forty".