15997106 has 4 divisors (see below), whose sum is σ = 23995662. Its totient is φ = 7998552.

The previous prime is 15997103. The next prime is 15997109. The reversal of 15997106 is 60179951.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (15997103) and next prime (15997109).

It can be written as a sum of positive squares in only one way, i.e., 12666481 + 3330625 = 3559^2 + 1825^2 .

It is a super-3 number, since 3×15997106³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15997106.

It is not an unprimeable number, because it can be changed into a prime (15997103) 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, 3999275 + ... + 3999278.

Almost surely, 2^15997106 is an apocalyptic number.

15997106 is a deficient number, since it is larger than the sum of its proper divisors (7998556).

15997106 is an equidigital number, since it uses as much as digits as its factorization.

15997106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7998555.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 15997106 is about 3999.6382336406. The cubic root of 15997106 is about 251.9690165149.

The spelling of 15997106 in words is "fifteen million, nine hundred ninety-seven thousand, one hundred six".