15810161 has 2 divisors, whose sum is σ = 15810162. Its totient is φ = 15810160.

The previous prime is 15810149. The next prime is 15810167. The reversal of 15810161 is 16101851.

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., 15555136 + 255025 = 3944^2 + 505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15810161 is a prime.

It is a super-2 number, since 2×15810161² = 499922381691842, which contains 22 as substring.

It is a Chen prime.

It is a zygodrome in base 13.

It is not a weakly prime, because it can be changed into another prime (15810167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7905080 + 7905081.

It is an arithmetic number, because the mean of its divisors is an integer number (7905081).

Almost surely, 2^15810161 is an apocalyptic number.

It is an amenable number.

15810161 is a deficient number, since it is larger than the sum of its proper divisors (1).

15810161 is an equidigital number, since it uses as much as digits as its factorization.

15810161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 15810161 is about 3976.1993159297. The cubic root of 15810161 is about 250.9836499881.

The spelling of 15810161 in words is "fifteen million, eight hundred ten thousand, one hundred sixty-one".