16215089 has 12 divisors (see below), whose sum is σ = 18441780. Its totient is φ = 14229600.

The previous prime is 16215079. The next prime is 16215097. The reversal of 16215089 is 98051261.

It can be written as a sum of positive squares in 2 ways, for example, as 7263025 + 8952064 = 2695^2 + 2992^2 .

It is not a de Polignac number, because 16215089 - 2¹² = 16210993 is a prime.

It is a super-2 number, since 2×16215089² = 525858222555842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16215019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1199 + ... + 5819.

It is an arithmetic number, because the mean of its divisors is an integer number (1536815).

Almost surely, 2^16215089 is an apocalyptic number.

It is an amenable number.

16215089 is a deficient number, since it is larger than the sum of its proper divisors (2226691).

16215089 is a wasteful number, since it uses less digits than its factorization.

16215089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4672 (or 4661 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 16215089 is about 4026.7963693239. The cubic root of 16215089 is about 253.1083341972.

It can be divided in two parts, 162 and 15089, that added together give a palindrome (15251).

The spelling of 16215089 in words is "sixteen million, two hundred fifteen thousand, eighty-nine".