15945955 has 4 divisors (see below), whose sum is σ = 19135152. Its totient is φ = 12756760.

The previous prime is 15945947. The next prime is 15945971. The reversal of 15945955 is 55954951.

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

It is not a de Polignac number, because 15945955 - 2³ = 15945947 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1594591 + ... + 1594600.

It is an arithmetic number, because the mean of its divisors is an integer number (4783788).

Almost surely, 2^15945955 is an apocalyptic number.

15945955 is a deficient number, since it is larger than the sum of its proper divisors (3189197).

15945955 is an equidigital number, since it uses as much as digits as its factorization.

15945955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189196.

The product of its digits is 202500, while the sum is 43.

The square root of 15945955 is about 3993.2386605361. The cubic root of 15945955 is about 251.7001714575.

It can be divided in two parts, 15945 and 955, that added together give a square (16900 = 130²).

The spelling of 15945955 in words is "fifteen million, nine hundred forty-five thousand, nine hundred fifty-five".