22081437 has 16 divisors (see below), whose sum is σ = 37386880. Its totient is φ = 12617856.

The previous prime is 22081429. The next prime is 22081459. The reversal of 22081437 is 73418022.

22081437 is a `hidden beast` number, since 220 + 8 + 1 + 437 = 666.

It is not a de Polignac number, because 22081437 - 2³ = 22081429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22081437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22089437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58228 + ... + 58605.

It is an arithmetic number, because the mean of its divisors is an integer number (2336680).

Almost surely, 2^22081437 is an apocalyptic number.

22081437 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

22081437 is a deficient number, since it is larger than the sum of its proper divisors (15305443).

22081437 is a wasteful number, since it uses less digits than its factorization.

22081437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116849 (or 116843 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 22081437 is about 4699.0889542549. The cubic root of 22081437 is about 280.5492492666.

Adding to 22081437 its reverse (73418022), we get a palindrome (95499459).

The spelling of 22081437 in words is "twenty-two million, eighty-one thousand, four hundred thirty-seven".