2111355523 has 4 divisors (see below), whose sum is σ = 2142868360. Its totient is φ = 2079842688.

The previous prime is 2111355503. The next prime is 2111355539. The reversal of 2111355523 is 3255531112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111355523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111355491 and 2111355500.

It is not an unprimeable number, because it can be changed into a prime (2111355503) 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, 15756318 + ... + 15756451.

It is an arithmetic number, because the mean of its divisors is an integer number (535717090).

Almost surely, 2^2111355523 is an apocalyptic number.

2111355523 is a deficient number, since it is larger than the sum of its proper divisors (31512837).

2111355523 is an equidigital number, since it uses as much as digits as its factorization.

2111355523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31512836.

The product of its digits is 4500, while the sum is 28.

The square root of 2111355523 is about 45949.4888219662. The cubic root of 2111355523 is about 1282.8832148010.

Adding to 2111355523 its reverse (3255531112), we get a palindrome (5366886635).

It can be divided in two parts, 21113 and 55523, that added together give a triangular number (76636 = T₃₉₁).

The spelling of 2111355523 in words is "two billion, one hundred eleven million, three hundred fifty-five thousand, five hundred twenty-three".