22072361 has 4 divisors (see below), whose sum is σ = 22084224. Its totient is φ = 22060500.

The previous prime is 22072343. The next prime is 22072399. The reversal of 22072361 is 16327022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22072361 is a prime.

It is a super-2 number, since 2×22072361² = 974378240228642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22072331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2465 + ... + 7086.

It is an arithmetic number, because the mean of its divisors is an integer number (5521056).

Almost surely, 2^22072361 is an apocalyptic number.

It is an amenable number.

22072361 is a deficient number, since it is larger than the sum of its proper divisors (11863).

22072361 is an equidigital number, since it uses as much as digits as its factorization.

22072361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11862.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 22072361 is about 4698.1231358916. The cubic root of 22072361 is about 280.5108065100.

Adding to 22072361 its reverse (16327022), we get a palindrome (38399383).

The spelling of 22072361 in words is "twenty-two million, seventy-two thousand, three hundred sixty-one".