2142230081 has 4 divisors (see below), whose sum is σ = 2142331092. Its totient is φ = 2142129072.

The previous prime is 2142230071. The next prime is 2142230119. The reversal of 2142230081 is 1800322412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 991935025 + 1150295056 = 31495^2 + 33916^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142230081 - 2²² = 2138035777 is a prime.

It is a super-2 number, since 2×2142230081² = 9178299439882533122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2142230071) 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, 5066 + ... + 65651.

It is an arithmetic number, because the mean of its divisors is an integer number (535582773).

Almost surely, 2^2142230081 is an apocalyptic number.

It is an amenable number.

2142230081 is a deficient number, since it is larger than the sum of its proper divisors (101011).

2142230081 is an equidigital number, since it uses as much as digits as its factorization.

2142230081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101010.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 2142230081 is about 46284.2314508948. The cubic root of 2142230081 is about 1289.1062216221.

Adding to 2142230081 its reverse (1800322412), we get a palindrome (3942552493).

The spelling of 2142230081 in words is "two billion, one hundred forty-two million, two hundred thirty thousand, eighty-one".