22275820 has 24 divisors (see below), whose sum is σ = 53462304. Its totient is φ = 7637376.

The previous prime is 22275817. The next prime is 22275823. The reversal of 22275820 is 2857222.

It is an interprime number because it is at equal distance from previous prime (22275817) and next prime (22275823).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (22275823) 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, 79417 + ... + 79696.

It is an arithmetic number, because the mean of its divisors is an integer number (2227596).

Almost surely, 2^22275820 is an apocalyptic number.

22275820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22275820 is an abundant number, since it is smaller than the sum of its proper divisors (31186484).

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

22275820 is a wasteful number, since it uses less digits than its factorization.

22275820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159129 (or 159127 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 22275820 is about 4719.7266870021. The cubic root of 22275820 is about 281.3700708721.

It can be divided in two parts, 222758 and 20, that added together give a triangular number (222778 = T₆₆₇).

The spelling of 22275820 in words is "twenty-two million, two hundred seventy-five thousand, eight hundred twenty".