2130811481 has 4 divisors (see below), whose sum is σ = 2146141200. Its totient is φ = 2115481764.

The previous prime is 2130811477. The next prime is 2130811499. The reversal of 2130811481 is 1841180312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2130811481 - 2² = 2130811477 is a prime.

It is a super-2 number, since 2×2130811481² = 9080715135122826722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2130811181) 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, 7664651 + ... + 7664928.

It is an arithmetic number, because the mean of its divisors is an integer number (536535300).

Almost surely, 2^2130811481 is an apocalyptic number.

It is an amenable number.

2130811481 is a deficient number, since it is larger than the sum of its proper divisors (15329719).

2130811481 is a wasteful number, since it uses less digits than its factorization.

2130811481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15329718.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 2130811481 is about 46160.7136101685. The cubic root of 2130811481 is about 1286.8117249526.

Adding to 2130811481 its reverse (1841180312), we get a palindrome (3971991793).

The spelling of 2130811481 in words is "two billion, one hundred thirty million, eight hundred eleven thousand, four hundred eighty-one".