23091516 has 72 divisors (see below), whose sum is σ = 68292224. Its totient is φ = 6441120.

The previous prime is 23091499. The next prime is 23091539. The reversal of 23091516 is 61519032.

It is a super-2 number, since 2×23091516² = 1066436222356512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23091516.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9771 + ... + 11901.

Almost surely, 2^23091516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23091516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34146112).

23091516 is an abundant number, since it is smaller than the sum of its proper divisors (45200708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23091516 is a wasteful number, since it uses less digits than its factorization.

23091516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191 (or 2186 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 23091516 is about 4805.3632536989. The cubic root of 23091516 is about 284.7633862528.

The spelling of 23091516 in words is "twenty-three million, ninety-one thousand, five hundred sixteen".