2131122431 has 8 divisors (see below), whose sum is σ = 2354590944. Its totient is φ = 1918554880.

The previous prime is 2131122353. The next prime is 2131122443. The reversal of 2131122431 is 1342211312.

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 2131122431 - 2¹⁰ = 2131121407 is a prime.

It is a super-2 number, since 2×2131122431² = 9083365631822699522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131122451) 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, 2724830 + ... + 2725611.

It is an arithmetic number, because the mean of its divisors is an integer number (294323868).

Almost surely, 2^2131122431 is an apocalyptic number.

2131122431 is a deficient number, since it is larger than the sum of its proper divisors (223468513).

2131122431 is a wasteful number, since it uses less digits than its factorization.

2131122431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5450481.

The product of its digits is 288, while the sum is 20.

The square root of 2131122431 is about 46164.0816111401. The cubic root of 2131122431 is about 1286.8743168567.

Adding to 2131122431 its reverse (1342211312), we get a palindrome (3473333743).

The spelling of 2131122431 in words is "two billion, one hundred thirty-one million, one hundred twenty-two thousand, four hundred thirty-one".