22381137 has 16 divisors (see below), whose sum is σ = 33264000. Its totient is φ = 14872752.

The previous prime is 22381133. The next prime is 22381157. The reversal of 22381137 is 73118322.

It is not a de Polignac number, because 22381137 - 2² = 22381133 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 22381137.

It is not an unprimeable number, because it can be changed into a prime (22381133) 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, 8539 + ... + 10847.

It is an arithmetic number, because the mean of its divisors is an integer number (2079000).

Almost surely, 2^22381137 is an apocalyptic number.

22381137 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

22381137 is a deficient number, since it is larger than the sum of its proper divisors (10882863).

22381137 is a wasteful number, since it uses less digits than its factorization.

22381137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2677 (or 2671 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 22381137 is about 4730.8706386880. The cubic root of 22381137 is about 281.8128001590.

Adding to 22381137 its reverse (73118322), we get a palindrome (95499459).

It can be divided in two parts, 2238 and 1137, that added together give a cube (3375 = 15³).

The spelling of 22381137 in words is "twenty-two million, three hundred eighty-one thousand, one hundred thirty-seven".