15532157 has 2 divisors, whose sum is σ = 15532158. Its totient is φ = 15532156.

The previous prime is 15532133. The next prime is 15532171. The reversal of 15532157 is 75123551.

It is a happy number.

15532157 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., 15531481 + 676 = 3941^2 + 26^2 .

It is an emirp because it is prime and its reverse (75123551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15532157 - 2¹⁰ = 15531133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15532117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7766078 + 7766079.

It is an arithmetic number, because the mean of its divisors is an integer number (7766079).

Almost surely, 2^15532157 is an apocalyptic number.

It is an amenable number.

15532157 is a deficient number, since it is larger than the sum of its proper divisors (1).

15532157 is an equidigital number, since it uses as much as digits as its factorization.

15532157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5250, while the sum is 29.

The square root of 15532157 is about 3941.0857641011. The cubic root of 15532157 is about 249.5038533387.

The spelling of 15532157 in words is "fifteen million, five hundred thirty-two thousand, one hundred fifty-seven".