22225357731 has 4 divisors (see below), whose sum is σ = 29633810312. Its totient is φ = 14816905152.

The previous prime is 22225357729. The next prime is 22225357753. The reversal of 22225357731 is 13775352222.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22225357731 - 2¹ = 22225357729 is a prime.

It is a super-2 number, since 2×22225357731² (a number of 21 digits) contains 22 as substring.

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 22225357731.

It is not an unprimeable number, because it can be changed into a prime (22225359731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3704226286 + ... + 3704226291.

It is an arithmetic number, because the mean of its divisors is an integer number (7408452578).

Almost surely, 2^22225357731 is an apocalyptic number.

22225357731 is a deficient number, since it is larger than the sum of its proper divisors (7408452581).

22225357731 is an equidigital number, since it uses as much as digits as its factorization.

22225357731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7408452580.

The product of its digits is 176400, while the sum is 39.

The spelling of 22225357731 in words is "twenty-two billion, two hundred twenty-five million, three hundred fifty-seven thousand, seven hundred thirty-one".