15244040213 has 4 divisors (see below), whose sum is σ = 15296067948. Its totient is φ = 15192012480.

The previous prime is 15244040177. The next prime is 15244040261. The reversal of 15244040213 is 31204044251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31204044251 = 71 ⋅439493581.

It can be written as a sum of positive squares in 2 ways, for example, as 14723880964 + 520159249 = 121342^2 + 22807^2 .

It is a cyclic number.

It is not a de Polignac number, because 15244040213 - 2²⁸ = 14975604757 is a prime.

It is a super-2 number, since 2×15244040213² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15244045213) 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, 26013428 + ... + 26014013.

It is an arithmetic number, because the mean of its divisors is an integer number (3824016987).

Almost surely, 2^15244040213 is an apocalyptic number.

It is an amenable number.

15244040213 is a deficient number, since it is larger than the sum of its proper divisors (52027735).

15244040213 is an equidigital number, since it uses as much as digits as its factorization.

15244040213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52027734.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 15244040213 its reverse (31204044251), we get a palindrome (46448084464).

The spelling of 15244040213 in words is "fifteen billion, two hundred forty-four million, forty thousand, two hundred thirteen".