22002491 has 8 divisors (see below), whose sum is σ = 25428960. Its totient is φ = 18646848.

The previous prime is 22002443. The next prime is 22002509. The reversal of 22002491 is 19420022.

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

It is a cyclic number.

It is not a de Polignac number, because 22002491 - 2¹⁰ = 22001467 is a prime.

It is a super-2 number, since 2×22002491² = 968219220410162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22002391) 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, 17036 + ... + 18281.

It is an arithmetic number, because the mean of its divisors is an integer number (3178620).

Almost surely, 2^22002491 is an apocalyptic number.

22002491 is a deficient number, since it is larger than the sum of its proper divisors (3426469).

22002491 is an equidigital number, since it uses as much as digits as its factorization.

22002491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35413.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 22002491 is about 4690.6812937994. The cubic root of 22002491 is about 280.2145082421.

The spelling of 22002491 in words is "twenty-two million, two thousand, four hundred ninety-one".