2140531 has 2 divisors, whose sum is σ = 2140532. Its totient is φ = 2140530.

The previous prime is 2140517. The next prime is 2140543. The reversal of 2140531 is 1350412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2140531 - 2¹¹ = 2138483 is a prime.

It is a super-3 number, since 3×2140531³ = 29422923339418023873, which contains 333 as substring. Note that it is a super-d number also for d = 2.

2140531 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2140591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070265 + 1070266.

It is an arithmetic number, because the mean of its divisors is an integer number (1070266).

2^2140531 is an apocalyptic number.

2140531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2140531 is an equidigital number, since it uses as much as digits as its factorization.

2140531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 2140531 is about 1463.0553646394. The cubic root of 2140531 is about 128.8765319054.

Adding to 2140531 its reverse (1350412), we get a palindrome (3490943).

The spelling of 2140531 in words is "two million, one hundred forty thousand, five hundred thirty-one".