2142931481 has 8 divisors (see below), whose sum is σ = 2347227720. Its totient is φ = 1947328768.

The previous prime is 2142931477. The next prime is 2142931499. The reversal of 2142931481 is 1841392412.

It can be written as a sum of positive squares in 4 ways, for example, as 855270025 + 1287661456 = 29245^2 + 35884^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2142931481 - 2² = 2142931477 is a prime.

It is a super-2 number, since 2×2142931481² = 9184310664521706722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2142931411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2172866 + ... + 2173851.

It is an arithmetic number, because the mean of its divisors is an integer number (293403465).

Almost surely, 2^2142931481 is an apocalyptic number.

It is an amenable number.

2142931481 is a deficient number, since it is larger than the sum of its proper divisors (204296239).

2142931481 is a wasteful number, since it uses less digits than its factorization.

2142931481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4346763.

The product of its digits is 13824, while the sum is 35.

The square root of 2142931481 is about 46291.8079253770. The cubic root of 2142931481 is about 1289.2468975232.

It can be divided in two parts, 2142931 and 481, that added together give a palindrome (2143412).

The spelling of 2142931481 in words is "two billion, one hundred forty-two million, nine hundred thirty-one thousand, four hundred eighty-one".