22081532 has 36 divisors (see below), whose sum is σ = 43503768. Its totient is φ = 9794400.

The previous prime is 22081481. The next prime is 22081561. The reversal of 22081532 is 23518022.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 22081498 and 22081507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20282 + ... + 21342.

It is an arithmetic number, because the mean of its divisors is an integer number (1208438).

Almost surely, 2^22081532 is an apocalyptic number.

22081532 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22081532 is a deficient number, since it is larger than the sum of its proper divisors (21422236).

22081532 is a wasteful number, since it uses less digits than its factorization.

22081532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 22081532 is about 4699.0990625864. The cubic root of 22081532 is about 280.5496515976.

Adding to 22081532 its reverse (23518022), we get a palindrome (45599554).

The spelling of 22081532 in words is "twenty-two million, eighty-one thousand, five hundred thirty-two".