22601965 has 4 divisors (see below), whose sum is σ = 27122364. Its totient is φ = 18081568.

The previous prime is 22601869. The next prime is 22601987. The reversal of 22601965 is 56910622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15515721 + 7086244 = 3939^2 + 2662^2 .

It is a cyclic number.

It is not a de Polignac number, because 22601965 - 2⁷ = 22601837 is a prime.

It is a super-2 number, since 2×22601965² = 1021697643722450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2260192 + ... + 2260201.

It is an arithmetic number, because the mean of its divisors is an integer number (6780591).

Almost surely, 2^22601965 is an apocalyptic number.

It is an amenable number.

22601965 is a deficient number, since it is larger than the sum of its proper divisors (4520399).

22601965 is an equidigital number, since it uses as much as digits as its factorization.

22601965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4520398.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 22601965 is about 4754.1523955380. The cubic root of 22601965 is about 282.7366226955.

It can be divided in two parts, 2260 and 1965, that added together give a square (4225 = 65²).

The spelling of 22601965 in words is "twenty-two million, six hundred one thousand, nine hundred sixty-five".