15522161 has 2 divisors, whose sum is σ = 15522162. Its totient is φ = 15522160.

The previous prime is 15522127. The next prime is 15522167. The reversal of 15522161 is 16122551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8014561 + 7507600 = 2831^2 + 2740^2 .

It is a cyclic number.

It is not a de Polignac number, because 15522161 - 2¹⁰ = 15521137 is a prime.

It is not a weakly prime, because it can be changed into another prime (15522167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7761080 + 7761081.

It is an arithmetic number, because the mean of its divisors is an integer number (7761081).

Almost surely, 2^15522161 is an apocalyptic number.

It is an amenable number.

15522161 is a deficient number, since it is larger than the sum of its proper divisors (1).

15522161 is an equidigital number, since it uses as much as digits as its factorization.

15522161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 23.

The square root of 15522161 is about 3939.8173815546. The cubic root of 15522161 is about 249.4503176162.

The spelling of 15522161 in words is "fifteen million, five hundred twenty-two thousand, one hundred sixty-one".