15122415540 has 24 divisors (see below), whose sum is σ = 42342763680. Its totient is φ = 4032644128.

The previous prime is 15122415481. The next prime is 15122415551. The reversal of 15122415540 is 4551422151.

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 = 15122415498 and 15122415507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126020070 + ... + 126020189.

It is an arithmetic number, because the mean of its divisors is an integer number (1764281820).

Almost surely, 2^15122415540 is an apocalyptic number.

15122415540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15122415540 is an abundant number, since it is smaller than the sum of its proper divisors (27220348140).

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

15122415540 is a wasteful number, since it uses less digits than its factorization.

15122415540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252040271 (or 252040269 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

Adding to 15122415540 its reverse (4551422151), we get a palindrome (19673837691).

The spelling of 15122415540 in words is "fifteen billion, one hundred twenty-two million, four hundred fifteen thousand, five hundred forty".