11531255222 has 4 divisors (see below), whose sum is σ = 17296882836. Its totient is φ = 5765627610.

The previous prime is 11531255221. The next prime is 11531255243. The reversal of 11531255222 is 22255213511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22255213511 = 2791 ⋅7973921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531255221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2882813804 + ... + 2882813807.

It is an arithmetic number, because the mean of its divisors is an integer number (4324220709).

Almost surely, 2^11531255222 is an apocalyptic number.

11531255222 is a deficient number, since it is larger than the sum of its proper divisors (5765627614).

11531255222 is an equidigital number, since it uses as much as digits as its factorization.

11531255222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5765627613.

The product of its digits is 6000, while the sum is 29.

Adding to 11531255222 its reverse (22255213511), we get a palindrome (33786468733).

The spelling of 11531255222 in words is "eleven billion, five hundred thirty-one million, two hundred fifty-five thousand, two hundred twenty-two".