22313540 has 24 divisors (see below), whose sum is σ = 47136600. Its totient is φ = 8872448.

The previous prime is 22313539. The next prime is 22313561. The reversal of 22313540 is 4531322.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12974404 + 9339136 = 3602^2 + 3056^2 .

It is a super-3 number, since 3×22313540³ (a number of 23 digits) contains 333 as substring.

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

It is an unprimeable number.

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, 236 + ... + 6684.

It is an arithmetic number, because the mean of its divisors is an integer number (1964025).

Almost surely, 2^22313540 is an apocalyptic number.

22313540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22313540 is an abundant number, since it is smaller than the sum of its proper divisors (24823060).

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

22313540 is a wasteful number, since it uses less digits than its factorization.

22313540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6631 (or 6629 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 22313540 is about 4723.7209909138. The cubic root of 22313540 is about 281.5287974519.

Adding to 22313540 its reverse (4531322), we get a palindrome (26844862).

The spelling of 22313540 in words is "twenty-two million, three hundred thirteen thousand, five hundred forty".