23227220 has 24 divisors (see below), whose sum is σ = 49329000. Its totient is φ = 9185792.

The previous prime is 23227207. The next prime is 23227223. The reversal of 23227220 is 2272232.

It can be written as a sum of positive squares in 4 ways, for example, as 835396 + 22391824 = 914^2 + 4732^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23227192 and 23227201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23227223) 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, 4745 + ... + 8304.

It is an arithmetic number, because the mean of its divisors is an integer number (2055375).

Almost surely, 2^23227220 is an apocalyptic number.

23227220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23227220 is an abundant number, since it is smaller than the sum of its proper divisors (26101780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23227220 is a wasteful number, since it uses less digits than its factorization.

23227220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13147 (or 13145 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 23227220 is about 4819.4626256461. The cubic root of 23227220 is about 285.3201286336.

Adding to 23227220 its reverse (2272232), we get a palindrome (25499452).

The spelling of 23227220 in words is "twenty-three million, two hundred twenty-seven thousand, two hundred twenty".