22215880 has 32 divisors (see below), whose sum is σ = 50153400. Its totient is φ = 8856576.

The previous prime is 22215877. The next prime is 22215899. The reversal of 22215880 is 8851222.

It can be written as a sum of positive squares in 4 ways, for example, as 15256836 + 6959044 = 3906^2 + 2638^2 .

It is a plaindrome in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14176 + ... + 15664.

Almost surely, 2^22215880 is an apocalyptic number.

22215880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22215880 is an abundant number, since it is smaller than the sum of its proper divisors (27937520).

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

22215880 is a wasteful number, since it uses less digits than its factorization.

22215880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873 (or 1869 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 22215880 is about 4713.3724656556. The cubic root of 22215880 is about 281.1174730354.

The spelling of 22215880 in words is "twenty-two million, two hundred fifteen thousand, eight hundred eighty".