1155531222 has 24 divisors (see below), whose sum is σ = 2505078576. Its totient is φ = 384957456.

The previous prime is 1155531211. The next prime is 1155531239. The reversal of 1155531222 is 2221355511.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15868 + ... + 50624.

It is an arithmetic number, because the mean of its divisors is an integer number (104378274).

Almost surely, 2^1155531222 is an apocalyptic number.

1155531222 is an abundant number, since it is smaller than the sum of its proper divisors (1349547354).

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

1155531222 is a wasteful number, since it uses less digits than its factorization.

1155531222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36612 (or 36609 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 1155531222 is about 33993.1055068524. The cubic root of 1155531222 is about 1049.3665785041.

Adding to 1155531222 its reverse (2221355511), we get a palindrome (3376886733).

The spelling of 1155531222 in words is "one billion, one hundred fifty-five million, five hundred thirty-one thousand, two hundred twenty-two".