15213130249 has 2 divisors, whose sum is σ = 15213130250. Its totient is φ = 15213130248.

The previous prime is 15213130241. The next prime is 15213130301. The reversal of 15213130249 is 94203131251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11302879225 + 3910251024 = 106315^2 + 62532^2 .

It is a cyclic number.

It is not a de Polignac number, because 15213130249 - 2³ = 15213130241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15213130249.

It is not a weakly prime, because it can be changed into another prime (15213130241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7606565124 + 7606565125.

It is an arithmetic number, because the mean of its divisors is an integer number (7606565125).

Almost surely, 2^15213130249 is an apocalyptic number.

It is an amenable number.

15213130249 is a deficient number, since it is larger than the sum of its proper divisors (1).

15213130249 is an equidigital number, since it uses as much as digits as its factorization.

15213130249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 15213130249 in words is "fifteen billion, two hundred thirteen million, one hundred thirty thousand, two hundred forty-nine".