16215242 has 4 divisors (see below), whose sum is σ = 24322866. Its totient is φ = 8107620.

The previous prime is 16215239. The next prime is 16215259. The reversal of 16215242 is 24251261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24251261 = 97 ⋅250013.

It can be written as a sum of positive squares in only one way, i.e., 13184161 + 3031081 = 3631^2 + 1741^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4053809 + ... + 4053812.

Almost surely, 2^16215242 is an apocalyptic number.

16215242 is a deficient number, since it is larger than the sum of its proper divisors (8107624).

16215242 is an equidigital number, since it uses as much as digits as its factorization.

16215242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8107623.

The product of its digits is 960, while the sum is 23.

The square root of 16215242 is about 4026.8153670115. The cubic root of 16215242 is about 253.1091302757.

The spelling of 16215242 in words is "sixteen million, two hundred fifteen thousand, two hundred forty-two".