16215949 has 8 divisors (see below), whose sum is σ = 17108640. Its totient is φ = 15327216.

The previous prime is 16215923. The next prime is 16215961. The reversal of 16215949 is 94951261.

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

It is not a de Polignac number, because 16215949 - 2⁵ = 16215917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16215919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11754 + ... + 13060.

It is an arithmetic number, because the mean of its divisors is an integer number (2138580).

Almost surely, 2^16215949 is an apocalyptic number.

16215949 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16215949 is a deficient number, since it is larger than the sum of its proper divisors (892691).

16215949 is a wasteful number, since it uses less digits than its factorization.

16215949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979.

The product of its digits is 19440, while the sum is 37.

The square root of 16215949 is about 4026.9031525479. The cubic root of 16215949 is about 253.1128088220.

The spelling of 16215949 in words is "sixteen million, two hundred fifteen thousand, nine hundred forty-nine".