15997922 has 8 divisors (see below), whose sum is σ = 24771072. Its totient is φ = 7740900.

The previous prime is 15997889. The next prime is 15997957. The reversal of 15997922 is 22979951.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 128954 + ... + 129077.

It is an arithmetic number, because the mean of its divisors is an integer number (3096384).

Almost surely, 2^15997922 is an apocalyptic number.

15997922 is a deficient number, since it is larger than the sum of its proper divisors (8773150).

15997922 is a wasteful number, since it uses less digits than its factorization.

15997922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258064.

The product of its digits is 102060, while the sum is 44.

The square root of 15997922 is about 3999.7402415657. The cubic root of 15997922 is about 251.9733006903.

The spelling of 15997922 in words is "fifteen million, nine hundred ninety-seven thousand, nine hundred twenty-two".