2143540831 has 2 divisors, whose sum is σ = 2143540832. Its totient is φ = 2143540830.

The previous prime is 2143540811. The next prime is 2143540843. The reversal of 2143540831 is 1380453412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2143540831 - 2⁵ = 2143540799 is a prime.

It is a super-2 number, since 2×2143540831² = 9189534588328341122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2143540793 and 2143540802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143540801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071770415 + 1071770416.

It is an arithmetic number, because the mean of its divisors is an integer number (1071770416).

Almost surely, 2^2143540831 is an apocalyptic number.

2143540831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143540831 is an equidigital number, since it uses as much as digits as its factorization.

2143540831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2143540831 is about 46298.3890756471. The cubic root of 2143540831 is about 1289.3690865514.

The spelling of 2143540831 in words is "two billion, one hundred forty-three million, five hundred forty thousand, eight hundred thirty-one".