15966361 has 4 divisors (see below), whose sum is σ = 16030224. Its totient is φ = 15902500.

The previous prime is 15966359. The next prime is 15966371. The reversal of 15966361 is 16366951.

15966361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15966361 - 2¹ = 15966359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15966361.

It is not an unprimeable number, because it can be changed into a prime (15966371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31555 + ... + 32056.

It is an arithmetic number, because the mean of its divisors is an integer number (4007556).

Almost surely, 2^15966361 is an apocalyptic number.

It is an amenable number.

15966361 is a deficient number, since it is larger than the sum of its proper divisors (63863).

15966361 is an equidigital number, since it uses as much as digits as its factorization.

15966361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63862.

The product of its digits is 29160, while the sum is 37.

The square root of 15966361 is about 3995.7929125519. The cubic root of 15966361 is about 251.8074923910.

The spelling of 15966361 in words is "fifteen million, nine hundred sixty-six thousand, three hundred sixty-one".