515540101242 has 32 divisors (see below), whose sum is σ = 1034919244800. Its totient is φ = 171207061760.

The previous prime is 515540101217. The next prime is 515540101261. The reversal of 515540101242 is 242101045515.

It is a super-2 number, since 2×515540101242² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11954134 + ... + 11997182.

It is an arithmetic number, because the mean of its divisors is an integer number (32341226400).

Almost surely, 2^515540101242 is an apocalyptic number.

515540101242 is an abundant number, since it is smaller than the sum of its proper divisors (519379143558).

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

515540101242 is a wasteful number, since it uses less digits than its factorization.

515540101242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50438.

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

Adding to 515540101242 its reverse (242101045515), we get a palindrome (757641146757).

The spelling of 515540101242 in words is "five hundred fifteen billion, five hundred forty million, one hundred one thousand, two hundred forty-two".