22461540 has 24 divisors (see below), whose sum is σ = 62892480. Its totient is φ = 5989728.

The previous prime is 22461529. The next prime is 22461541. The reversal of 22461540 is 4516422.

It is a self number, because there is not a number n which added to its sum of digits gives 22461540.

It is not an unprimeable number, because it can be changed into a prime (22461541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187120 + ... + 187239.

It is an arithmetic number, because the mean of its divisors is an integer number (2620520).

Almost surely, 2^22461540 is an apocalyptic number.

22461540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22461540 is an abundant number, since it is smaller than the sum of its proper divisors (40430940).

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

22461540 is a wasteful number, since it uses less digits than its factorization.

22461540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374371 (or 374369 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 22461540 is about 4739.3607163836. The cubic root of 22461540 is about 282.1498625007.

Adding to 22461540 its reverse (4516422), we get a palindrome (26977962).

The spelling of 22461540 in words is "twenty-two million, four hundred sixty-one thousand, five hundred forty".