22231131505 has 32 divisors (see below), whose sum is σ = 30475699200. Its totient is φ = 15410239680.

The previous prime is 22231131497. The next prime is 22231131509. The reversal of 22231131505 is 50513113222.

It is not a de Polignac number, because 22231131505 - 2³ = 22231131497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22231131505.

It is not an unprimeable number, because it can be changed into a prime (22231131509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 326946 + ... + 389044.

It is an arithmetic number, because the mean of its divisors is an integer number (952365600).

Almost surely, 2^22231131505 is an apocalyptic number.

It is an amenable number.

22231131505 is a deficient number, since it is larger than the sum of its proper divisors (8244567695).

22231131505 is a wasteful number, since it uses less digits than its factorization.

22231131505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62421.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 22231131505 its reverse (50513113222), we get a palindrome (72744244727).

The spelling of 22231131505 in words is "twenty-two billion, two hundred thirty-one million, one hundred thirty-one thousand, five hundred five".