515374013321 has 4 divisors (see below), whose sum is σ = 515449114752. Its totient is φ = 515298911892.

The previous prime is 515374013317. The next prime is 515374013383. The reversal of 515374013321 is 123310473515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 515374013321 - 2² = 515374013317 is a prime.

It is a super-2 number, since 2×515374013321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (515374093321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37540421 + ... + 37554146.

It is an arithmetic number, because the mean of its divisors is an integer number (128862278688).

Almost surely, 2^515374013321 is an apocalyptic number.

It is an amenable number.

515374013321 is a deficient number, since it is larger than the sum of its proper divisors (75101431).

515374013321 is an equidigital number, since it uses as much as digits as its factorization.

515374013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75101430.

The product of its (nonzero) digits is 37800, while the sum is 35.

Adding to 515374013321 its reverse (123310473515), we get a palindrome (638684486836).

The spelling of 515374013321 in words is "five hundred fifteen billion, three hundred seventy-four million, thirteen thousand, three hundred twenty-one".