2011312155 has 8 divisors (see below), whose sum is σ = 3218099472. Its totient is φ = 1072699808.

The previous prime is 2011312129. The next prime is 2011312189. The reversal of 2011312155 is 5512131102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2011312155 - 2⁵ = 2011312123 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67043724 + ... + 67043753.

It is an arithmetic number, because the mean of its divisors is an integer number (402262434).

Almost surely, 2^2011312155 is an apocalyptic number.

2011312155 is a deficient number, since it is larger than the sum of its proper divisors (1206787317).

2011312155 is a wasteful number, since it uses less digits than its factorization.

2011312155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134087485.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 2011312155 is about 44847.6549554155. The cubic root of 2011312155 is about 1262.2919891262.

Adding to 2011312155 its reverse (5512131102), we get a palindrome (7523443257).

The spelling of 2011312155 in words is "two billion, eleven million, three hundred twelve thousand, one hundred fifty-five".