2131212431 has 16 divisors (see below), whose sum is σ = 2216077920. Its totient is φ = 2048148480.

The previous prime is 2131212409. The next prime is 2131212439. The reversal of 2131212431 is 1342121312.

It is a cyclic number.

It is not a de Polignac number, because 2131212431 - 2⁶ = 2131212367 is a prime.

It is a super-2 number, since 2×2131212431² = 9084132852097859522, 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 (2131212439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 800180 + ... + 802838.

It is an arithmetic number, because the mean of its divisors is an integer number (138504870).

Almost surely, 2^2131212431 is an apocalyptic number.

2131212431 is a deficient number, since it is larger than the sum of its proper divisors (84865489).

2131212431 is a wasteful number, since it uses less digits than its factorization.

2131212431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986.

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

The square root of 2131212431 is about 46165.0563846726. The cubic root of 2131212431 is about 1286.8924320459.

Adding to 2131212431 its reverse (1342121312), we get a palindrome (3473333743).

The spelling of 2131212431 in words is "two billion, one hundred thirty-one million, two hundred twelve thousand, four hundred thirty-one".