15040315321 has 2 divisors, whose sum is σ = 15040315322. Its totient is φ = 15040315320.

The previous prime is 15040315267. The next prime is 15040315331. The reversal of 15040315321 is 12351304051.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13009911721 + 2030403600 = 114061^2 + 45060^2 .

It is a cyclic number.

It is not a de Polignac number, because 15040315321 - 2¹³ = 15040307129 is a prime.

It is a super-2 number, since 2×15040315321² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15040315331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7520157660 + 7520157661.

It is an arithmetic number, because the mean of its divisors is an integer number (7520157661).

Almost surely, 2^15040315321 is an apocalyptic number.

It is an amenable number.

15040315321 is a deficient number, since it is larger than the sum of its proper divisors (1).

15040315321 is an equidigital number, since it uses as much as digits as its factorization.

15040315321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 15040315321 its reverse (12351304051), we get a palindrome (27391619372).

The spelling of 15040315321 in words is "fifteen billion, forty million, three hundred fifteen thousand, three hundred twenty-one".