22351140 has 192 divisors, whose sum is σ = 81553920. Its totient is φ = 5038848.

The previous prime is 22351129. The next prime is 22351151. The reversal of 22351140 is 4115322.

It is an interprime number because it is at equal distance from previous prime (22351129) and next prime (22351151).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 306144 + ... + 306216.

It is an arithmetic number, because the mean of its divisors is an integer number (424760).

Almost surely, 2^22351140 is an apocalyptic number.

22351140 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 22351140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40776960).

22351140 is an abundant number, since it is smaller than the sum of its proper divisors (59202780).

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

22351140 is an equidigital number, since it uses as much as digits as its factorization.

22351140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 22351140 is about 4727.6992290119. The cubic root of 22351140 is about 281.6868411414.

Adding to 22351140 its reverse (4115322), we get a palindrome (26466462).

It can be divided in two parts, 2235 and 1140, that added together give a cube (3375 = 15³).

The spelling of 22351140 in words is "twenty-two million, three hundred fifty-one thousand, one hundred forty".