2011855263 has 24 divisors (see below), whose sum is σ = 2951042304. Its totient is φ = 1218257040.

The previous prime is 2011855243. The next prime is 2011855283. The reversal of 2011855263 is 3625581102.

It is an interprime number because it is at equal distance from previous prime (2011855243) and next prime (2011855283).

It is not a de Polignac number, because 2011855263 - 2⁵ = 2011855231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011855243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 725706 + ... + 728472.

It is an arithmetic number, because the mean of its divisors is an integer number (122960096).

Almost surely, 2^2011855263 is an apocalyptic number.

2011855263 is a deficient number, since it is larger than the sum of its proper divisors (939187041).

2011855263 is a wasteful number, since it uses less digits than its factorization.

2011855263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4795 (or 4784 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 2011855263 is about 44853.7095790304. The cubic root of 2011855263 is about 1262.4055964179.

The spelling of 2011855263 in words is "two billion, eleven million, eight hundred fifty-five thousand, two hundred sixty-three".