2140078531 has 2 divisors, whose sum is σ = 2140078532. Its totient is φ = 2140078530.

The previous prime is 2140078529. The next prime is 2140078543. The reversal of 2140078531 is 1358700412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2140078531 - 2¹ = 2140078529 is a prime.

It is a super-2 number, since 2×2140078531² = 9159872237694235922, which contains 22 as substring.

Together with 2140078529, it forms a pair of twin primes.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 2140078493 and 2140078502.

It is not a weakly prime, because it can be changed into another prime (2140078561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070039265 + 1070039266.

It is an arithmetic number, because the mean of its divisors is an integer number (1070039266).

Almost surely, 2^2140078531 is an apocalyptic number.

2140078531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2140078531 is an equidigital number, since it uses as much as digits as its factorization.

2140078531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 2140078531 is about 46260.9828148949. The cubic root of 2140078531 is about 1288.6745055362.

Adding to 2140078531 its reverse (1358700412), we get a palindrome (3498778943).

The spelling of 2140078531 in words is "two billion, one hundred forty million, seventy-eight thousand, five hundred thirty-one".