15240140515 has 16 divisors (see below), whose sum is σ = 19094822208. Its totient is φ = 11654983296.

The previous prime is 15240140479. The next prime is 15240140537. The reversal of 15240140515 is 51504104251.

It is a cyclic number.

It is not a de Polignac number, because 15240140515 - 2¹⁵ = 15240107747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155557 + ... + 233833.

It is an arithmetic number, because the mean of its divisors is an integer number (1193426388).

Almost surely, 2^15240140515 is an apocalyptic number.

15240140515 is a deficient number, since it is larger than the sum of its proper divisors (3854681693).

15240140515 is a wasteful number, since it uses less digits than its factorization.

15240140515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79998.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 15240140515 its reverse (51504104251), we get a palindrome (66744244766).

The spelling of 15240140515 in words is "fifteen billion, two hundred forty million, one hundred forty thousand, five hundred fifteen".