22251140 has 24 divisors (see below), whose sum is σ = 47322240. Its totient is φ = 8787168.

The previous prime is 22251137. The next prime is 22251161. The reversal of 22251140 is 4115222.

It is a super-2 number, since 2×22251140² = 990226462599200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5462 + ... + 8621.

It is an arithmetic number, because the mean of its divisors is an integer number (1971760).

Almost surely, 2^22251140 is an apocalyptic number.

22251140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22251140 is an abundant number, since it is smaller than the sum of its proper divisors (25071100).

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

22251140 is a wasteful number, since it uses less digits than its factorization.

22251140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14171 (or 14169 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 22251140 is about 4717.1114042388. Note that the first 3 decimals coincide. The cubic root of 22251140 is about 281.2661198991.

Adding to 22251140 its reverse (4115222), we get a palindrome (26366362).

The spelling of 22251140 in words is "twenty-two million, two hundred fifty-one thousand, one hundred forty".