22542540 has 24 divisors (see below), whose sum is σ = 63119280. Its totient is φ = 6011328.

The previous prime is 22542539. The next prime is 22542547. The reversal of 22542540 is 4524522.

It is a happy number.

It is a super-2 number, since 2×22542540² = 1016332219303200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22542540.

It is not an unprimeable number, because it can be changed into a prime (22542547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187795 + ... + 187914.

It is an arithmetic number, because the mean of its divisors is an integer number (2629970).

Almost surely, 2^22542540 is an apocalyptic number.

22542540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22542540 is an abundant number, since it is smaller than the sum of its proper divisors (40576740).

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

22542540 is a wasteful number, since it uses less digits than its factorization.

22542540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375721 (or 375719 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 22542540 is about 4747.8984824868. The cubic root of 22542540 is about 282.4886151989.

The spelling of 22542540 in words is "twenty-two million, five hundred forty-two thousand, five hundred forty".