22273649 has 4 divisors (see below), whose sum is σ = 22325760. Its totient is φ = 22221540.

The previous prime is 22273633. The next prime is 22273663. The reversal of 22273649 is 94637222.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 22273649 - 2⁴ = 22273633 is a prime.

It is a super-2 number, since 2×22273649² = 992230879550402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22273609) 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, 25409 + ... + 26270.

It is an arithmetic number, because the mean of its divisors is an integer number (5581440).

Almost surely, 2^22273649 is an apocalyptic number.

It is an amenable number.

22273649 is a deficient number, since it is larger than the sum of its proper divisors (52111).

22273649 is an equidigital number, since it uses as much as digits as its factorization.

22273649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52110.

The product of its digits is 36288, while the sum is 35.

The square root of 22273649 is about 4719.4966892668. The cubic root of 22273649 is about 281.3609298054.

It can be divided in two parts, 22273 and 649, that added together give a palindrome (22922).

The spelling of 22273649 in words is "twenty-two million, two hundred seventy-three thousand, six hundred forty-nine".