22273731 has 16 divisors (see below), whose sum is σ = 33095200. Its totient is φ = 14805504.

The previous prime is 22273721. The next prime is 22273753. The reversal of 22273731 is 13737222.

It is a happy number.

It is not a de Polignac number, because 22273731 - 2²¹ = 20176579 is a prime.

It is a super-2 number, since 2×22273731² = 992238185320722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22273695 and 22273704.

It is not an unprimeable number, because it can be changed into a prime (22273721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10035 + ... + 12051.

It is an arithmetic number, because the mean of its divisors is an integer number (2068450).

Almost surely, 2^22273731 is an apocalyptic number.

22273731 is a deficient number, since it is larger than the sum of its proper divisors (10821469).

22273731 is a wasteful number, since it uses less digits than its factorization.

22273731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435 (or 2429 counting only the distinct ones).

The product of its digits is 3528, while the sum is 27.

The square root of 22273731 is about 4719.5053766258. The cubic root of 22273731 is about 281.3612750799.

The spelling of 22273731 in words is "twenty-two million, two hundred seventy-three thousand, seven hundred thirty-one".