15312149 has 2 divisors, whose sum is σ = 15312150. Its totient is φ = 15312148.

The previous prime is 15312131. The next prime is 15312151. The reversal of 15312149 is 94121351.

15312149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12909649 + 2402500 = 3593^2 + 1550^2 .

It is a cyclic number.

It is not a de Polignac number, because 15312149 - 2¹⁶ = 15246613 is a prime.

Together with 15312151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15312169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7656074 + 7656075.

It is an arithmetic number, because the mean of its divisors is an integer number (7656075).

Almost surely, 2^15312149 is an apocalyptic number.

It is an amenable number.

15312149 is a deficient number, since it is larger than the sum of its proper divisors (1).

15312149 is an equidigital number, since it uses as much as digits as its factorization.

15312149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 26.

The square root of 15312149 is about 3913.0741112328. The cubic root of 15312149 is about 248.3201996968.

The spelling of 15312149 in words is "fifteen million, three hundred twelve thousand, one hundred forty-nine".