22255040 has 56 divisors (see below), whose sum is σ = 56125872. Its totient is φ = 8376320.

The previous prime is 22255031. The next prime is 22255049. The reversal of 22255040 is 4055222.

It is an interprime number because it is at equal distance from previous prime (22255031) and next prime (22255049).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22255049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3395 + ... + 7485.

Almost surely, 2^22255040 is an apocalyptic number.

22255040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22255040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28062936).

22255040 is an abundant number, since it is smaller than the sum of its proper divisors (33870832).

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

22255040 is a wasteful number, since it uses less digits than its factorization.

22255040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125 (or 4115 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 22255040 is about 4717.5247747097. The cubic root of 22255040 is about 281.2825516233.

The spelling of 22255040 in words is "twenty-two million, two hundred fifty-five thousand, forty".