2111530000 has 50 divisors (see below), whose sum is σ = 5112249494. Its totient is φ = 844608000.

The previous prime is 2111529967. The next prime is 2111530009. The reversal of 2111530000 is 351112.

It can be written as a sum of positive squares in 5 ways, for example, as 302899216 + 1808630784 = 17404^2 + 42528^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is not an unprimeable number, because it can be changed into a prime (2111530009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 95577 + ... + 115576.

Almost surely, 2^2111530000 is an apocalyptic number.

2111530000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111530000 is an abundant number, since it is smaller than the sum of its proper divisors (3000719494).

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

2111530000 is an equidigital number, since it uses as much as digits as its factorization.

2111530000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211181 (or 211160 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 2111530000 is about 45951.3873566403. The cubic root of 2111530000 is about 1282.9185518861.

Adding to 2111530000 its reverse (351112), we get a palindrome (2111881112).

It can be divided in two parts, 21115 and 30000, that added together give a palindrome (51115).

The spelling of 2111530000 in words is "two billion, one hundred eleven million, five hundred thirty thousand".