16215081 has 8 divisors (see below), whose sum is σ = 21974784. Its totient is φ = 10632720.

The previous prime is 16215079. The next prime is 16215097. The reversal of 16215081 is 18051261.

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

It is not a de Polignac number, because 16215081 - 2¹ = 16215079 is a prime.

It is a super-2 number, since 2×16215081² = 525857703673122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16215041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44121 + ... + 44486.

It is an arithmetic number, because the mean of its divisors is an integer number (2746848).

Almost surely, 2^16215081 is an apocalyptic number.

It is an amenable number.

16215081 is a deficient number, since it is larger than the sum of its proper divisors (5759703).

16215081 is an equidigital number, since it uses as much as digits as its factorization.

16215081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88671.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 16215081 is about 4026.7953759783. The cubic root of 16215081 is about 253.1082925720.

The spelling of 16215081 in words is "sixteen million, two hundred fifteen thousand, eighty-one".