22031340 has 24 divisors (see below), whose sum is σ = 61687920. Its totient is φ = 5875008.

The previous prime is 22031333. The next prime is 22031357. The reversal of 22031340 is 4313022.

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

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, 183535 + ... + 183654.

It is an arithmetic number, because the mean of its divisors is an integer number (2570330).

Almost surely, 2^22031340 is an apocalyptic number.

22031340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22031340 is an abundant number, since it is smaller than the sum of its proper divisors (39656580).

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

22031340 is a wasteful number, since it uses less digits than its factorization.

22031340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367201 (or 367199 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 22031340 is about 4693.7554260954. The cubic root of 22031340 is about 280.3369243479.

Adding to 22031340 its reverse (4313022), we get a palindrome (26344362).

The spelling of 22031340 in words is "twenty-two million, thirty-one thousand, three hundred forty".