2155032011 has 4 divisors (see below), whose sum is σ = 2350944024. Its totient is φ = 1959120000.

The previous prime is 2155032007. The next prime is 2155032067. The reversal of 2155032011 is 1102305512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2155032011 - 2² = 2155032007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2155032071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97955990 + ... + 97956011.

It is an arithmetic number, because the mean of its divisors is an integer number (587736006).

Almost surely, 2^2155032011 is an apocalyptic number.

2155032011 is a deficient number, since it is larger than the sum of its proper divisors (195912013).

2155032011 is a wasteful number, since it uses less digits than its factorization.

2155032011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195912012.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 2155032011 is about 46422.3223352731. The cubic root of 2155032011 is about 1291.6690154898.

Adding to 2155032011 its reverse (1102305512), we get a palindrome (3257337523).

The spelling of 2155032011 in words is "two billion, one hundred fifty-five million, thirty-two thousand, eleven".