1155540222 has 32 divisors (see below), whose sum is σ = 2596730400. Its totient is φ = 380850624.

The previous prime is 1155540209. The next prime is 1155540241. The reversal of 1155540222 is 2220455511.

1155540222 is a `hidden beast` number, since 115 + 5 + 540 + 2 + 2 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115413 + ... + 125024.

It is an arithmetic number, because the mean of its divisors is an integer number (81147825).

Almost surely, 2^1155540222 is an apocalyptic number.

1155540222 is an abundant number, since it is smaller than the sum of its proper divisors (1441190178).

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

1155540222 is a wasteful number, since it uses less digits than its factorization.

1155540222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240537 (or 240531 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 1155540222 is about 33993.2378863797. The cubic root of 1155540222 is about 1049.3693028715.

Adding to 1155540222 its reverse (2220455511), we get a palindrome (3375995733).

The spelling of 1155540222 in words is "one billion, one hundred fifty-five million, five hundred forty thousand, two hundred twenty-two".