22131354 has 16 divisors (see below), whose sum is σ = 50586048. Its totient is φ = 6323232.

The previous prime is 22131289. The next prime is 22131397. The reversal of 22131354 is 45313122.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22131354.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263427 + ... + 263510.

It is an arithmetic number, because the mean of its divisors is an integer number (3161628).

Almost surely, 2^22131354 is an apocalyptic number.

22131354 is an abundant number, since it is smaller than the sum of its proper divisors (28454694).

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

22131354 is a wasteful number, since it uses less digits than its factorization.

22131354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526949.

The product of its digits is 720, while the sum is 21.

The square root of 22131354 is about 4704.3973046502. The cubic root of 22131354 is about 280.7604921242.

Adding to 22131354 its reverse (45313122), we get a palindrome (67444476).

The spelling of 22131354 in words is "twenty-two million, one hundred thirty-one thousand, three hundred fifty-four".