1155055212 has 36 divisors (see below), whose sum is σ = 2926505400. Its totient is φ = 384124032.

The previous prime is 1155055211. The next prime is 1155055219. The reversal of 1155055212 is 2125505511.

1155055212 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1155055211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21462 + ... + 52637.

Almost surely, 2^1155055212 is an apocalyptic number.

1155055212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1155055212 is an abundant number, since it is smaller than the sum of its proper divisors (1771450188).

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

1155055212 is a wasteful number, since it uses less digits than its factorization.

1155055212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74542 (or 74537 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The square root of 1155055212 is about 33986.1032188158. The cubic root of 1155055212 is about 1049.2224665492. Note that the first 3 decimals are identical.

The spelling of 1155055212 in words is "one billion, one hundred fifty-five million, fifty-five thousand, two hundred twelve".