22233540 has 48 divisors (see below), whose sum is σ = 71148672. Its totient is φ = 5081856.

The previous prime is 22233539. The next prime is 22233551. The reversal of 22233540 is 4533222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26049 + ... + 26888.

It is an arithmetic number, because the mean of its divisors is an integer number (1482264).

Almost surely, 2^22233540 is an apocalyptic number.

22233540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22233540 is an abundant number, since it is smaller than the sum of its proper divisors (48915132).

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

22233540 is a wasteful number, since it uses less digits than its factorization.

22233540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52956 (or 52954 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 22233540 is about 4715.2454867165. The cubic root of 22233540 is about 281.1919425841.

Adding to 22233540 its reverse (4533222), we get a palindrome (26766762).

The spelling of 22233540 in words is "twenty-two million, two hundred thirty-three thousand, five hundred forty".