22214540 has 12 divisors (see below), whose sum is σ = 46650576. Its totient is φ = 8885808.

The previous prime is 22214539. The next prime is 22214567. The reversal of 22214540 is 4541222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1110727 = 22214540 / (2 + 2 + 2 + 1 + 4 + 5 + 4 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555344 + ... + 555383.

It is an arithmetic number, because the mean of its divisors is an integer number (3887548).

Almost surely, 2^22214540 is an apocalyptic number.

22214540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22214540 is an abundant number, since it is smaller than the sum of its proper divisors (24436036).

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

22214540 is a wasteful number, since it uses less digits than its factorization.

22214540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110736 (or 1110734 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 22214540 is about 4713.2303147629. The cubic root of 22214540 is about 281.1118208475. Note that the first 3 decimals are identical.

Adding to 22214540 its reverse (4541222), we get a palindrome (26755762).

The spelling of 22214540 in words is "twenty-two million, two hundred fourteen thousand, five hundred forty".