8515402241 has 4 divisors (see below), whose sum is σ = 8520317652. Its totient is φ = 8510486832.

The previous prime is 8515402223. The next prime is 8515402271. The reversal of 8515402241 is 1422045158.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6769833841 + 1745568400 = 82279^2 + 41780^2 .

It is a cyclic number.

It is not a de Polignac number, because 8515402241 - 2¹⁰ = 8515401217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8515402198 and 8515402207.

It is not an unprimeable number, because it can be changed into a prime (8515402271) 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, 2455106 + ... + 2458571.

It is an arithmetic number, because the mean of its divisors is an integer number (2130079413).

Almost surely, 2^8515402241 is an apocalyptic number.

It is an amenable number.

8515402241 is a deficient number, since it is larger than the sum of its proper divisors (4915411).

8515402241 is a wasteful number, since it uses less digits than its factorization.

8515402241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4915410.

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 8515402241 is about 92278.9371471085. The cubic root of 8515402241 is about 2042.0594862861.

Adding to 8515402241 its reverse (1422045158), we get a palindrome (9937447399).

The spelling of 8515402241 in words is "eight billion, five hundred fifteen million, four hundred two thousand, two hundred forty-one".