22571340 has 72 divisors (see below), whose sum is σ = 69489840. Its totient is φ = 5470080.

The previous prime is 22571321. The next prime is 22571347. The reversal of 22571340 is 4317522.

22571340 = T₉₇₉ + T₉₈₀ + ... + T₁₀₂₃.

It is a self number, because there is not a number n which added to its sum of digits gives 22571340.

It is not an unprimeable number, because it can be changed into a prime (22571347) 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 23 ways as a sum of consecutive naturals, for example, 5706 + ... + 8814.

Almost surely, 2^22571340 is an apocalyptic number.

22571340 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 22571340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34744920).

22571340 is an abundant number, since it is smaller than the sum of its proper divisors (46918500).

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

22571340 is a wasteful number, since it uses less digits than its factorization.

22571340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143 (or 3130 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 22571340 is about 4750.9304351885. The cubic root of 22571340 is about 282.6088650303.

Adding to 22571340 its reverse (4317522), we get a palindrome (26888862).

The spelling of 22571340 in words is "twenty-two million, five hundred seventy-one thousand, three hundred forty".