22312140 has 24 divisors (see below), whose sum is σ = 62474160. Its totient is φ = 5949888.

The previous prime is 22312127. The next prime is 22312163. The reversal of 22312140 is 4121322.

It is a super-3 number, since 3×22312140³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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, 185875 + ... + 185994.

It is an arithmetic number, because the mean of its divisors is an integer number (2603090).

Almost surely, 2^22312140 is an apocalyptic number.

22312140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22312140 is an abundant number, since it is smaller than the sum of its proper divisors (40162020).

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

22312140 is a wasteful number, since it uses less digits than its factorization.

22312140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371881 (or 371879 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 22312140 is about 4723.5728003282. The cubic root of 22312140 is about 281.5229094192.

Adding to 22312140 its reverse (4121322), we get a palindrome (26433462).

It can be divided in two parts, 2231 and 2140, that added together give a triangular number (4371 = T₉₃).

The spelling of 22312140 in words is "twenty-two million, three hundred twelve thousand, one hundred forty".