15215149 has 2 divisors, whose sum is σ = 15215150. Its totient is φ = 15215148.

The previous prime is 15215117. The next prime is 15215159. The reversal of 15215149 is 94151251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10562500 + 4652649 = 3250^2 + 2157^2 .

It is a cyclic number.

It is not a de Polignac number, because 15215149 - 2⁵ = 15215117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15215159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7607574 + 7607575.

It is an arithmetic number, because the mean of its divisors is an integer number (7607575).

Almost surely, 2^15215149 is an apocalyptic number.

It is an amenable number.

15215149 is a deficient number, since it is larger than the sum of its proper divisors (1).

15215149 is an equidigital number, since it uses as much as digits as its factorization.

15215149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 28.

The square root of 15215149 is about 3900.6600723467. The cubic root of 15215149 is about 247.7947323771.

It can be divided in two parts, 1521 and 5149, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 15215149 in words is "fifteen million, two hundred fifteen thousand, one hundred forty-nine".