1515122540 has 24 divisors (see below), whose sum is σ = 3214563072. Its totient is φ = 599800320.

The previous prime is 1515122527. The next prime is 1515122549. The reversal of 1515122540 is 452215151.

It is a super-2 number, since 2×1515122540² = 4591192622432103200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1515122549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388556 + ... + 392435.

It is an arithmetic number, because the mean of its divisors is an integer number (133940128).

Almost surely, 2^1515122540 is an apocalyptic number.

1515122540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1515122540 is an abundant number, since it is smaller than the sum of its proper divisors (1699440532).

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

1515122540 is a wasteful number, since it uses less digits than its factorization.

1515122540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781097 (or 781095 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1515122540 is about 38924.5750137365. The cubic root of 1515122540 is about 1148.5482727519.

Adding to 1515122540 its reverse (452215151), we get a palindrome (1967337691).

The spelling of 1515122540 in words is "one billion, five hundred fifteen million, one hundred twenty-two thousand, five hundred forty".