22280731 has 8 divisors (see below), whose sum is σ = 24416064. Its totient is φ = 20163720.

The previous prime is 22280719. The next prime is 22280743. The reversal of 22280731 is 13708222.

It is an interprime number because it is at equal distance from previous prime (22280719) and next prime (22280743).

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 22280731 - 2¹⁵ = 22247963 is a prime.

It is a super-2 number, since 2×22280731² = 992861947788722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22280696 and 22280705.

It is not an unprimeable number, because it can be changed into a prime (22280431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1965 + ... + 6958.

It is an arithmetic number, because the mean of its divisors is an integer number (3052008).

Almost surely, 2^22280731 is an apocalyptic number.

22280731 is a deficient number, since it is larger than the sum of its proper divisors (2135333).

22280731 is a wasteful number, since it uses less digits than its factorization.

22280731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9161.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 22280731 is about 4720.2469215074. The cubic root of 22280731 is about 281.3907466076.

Adding to 22280731 its reverse (13708222), we get a palindrome (35988953).

The spelling of 22280731 in words is "twenty-two million, two hundred eighty thousand, seven hundred thirty-one".