2131798281 has 8 divisors (see below), whose sum is σ = 2860502784. Its totient is φ = 1412146320.

The previous prime is 2131798259. The next prime is 2131798301. The reversal of 2131798281 is 1828971312.

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

It is not a de Polignac number, because 2131798281 - 2⁷ = 2131798153 is a prime.

It is a super-2 number, since 2×2131798281² = 9089127821749109922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2131798231) 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, 2262585 + ... + 2263526.

It is an arithmetic number, because the mean of its divisors is an integer number (357562848).

Almost surely, 2^2131798281 is an apocalyptic number.

It is an amenable number.

2131798281 is a deficient number, since it is larger than the sum of its proper divisors (728704503).

2131798281 is a wasteful number, since it uses less digits than its factorization.

2131798281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4526271.

The product of its digits is 48384, while the sum is 42.

The square root of 2131798281 is about 46171.4011158423. The cubic root of 2131798281 is about 1287.0103394005.

The spelling of 2131798281 in words is "two billion, one hundred thirty-one million, seven hundred ninety-eight thousand, two hundred eighty-one".