15040013 has 2 divisors, whose sum is σ = 15040014. Its totient is φ = 15040012.

The previous prime is 15040007. The next prime is 15040037. The reversal of 15040013 is 31004051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14160169 + 879844 = 3763^2 + 938^2 .

It is a cyclic number.

It is not a de Polignac number, because 15040013 - 2⁶ = 15039949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15040013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15040043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7520006 + 7520007.

It is an arithmetic number, because the mean of its divisors is an integer number (7520007).

Almost surely, 2^15040013 is an apocalyptic number.

It is an amenable number.

15040013 is a deficient number, since it is larger than the sum of its proper divisors (1).

15040013 is an equidigital number, since it uses as much as digits as its factorization.

15040013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 15040013 is about 3878.1455619922. The cubic root of 15040013 is about 246.8403028308.

Adding to 15040013 its reverse (31004051), we get a palindrome (46044064).

The spelling of 15040013 in words is "fifteen million, forty thousand, thirteen".