2811061531 has 2 divisors, whose sum is σ = 2811061532. Its totient is φ = 2811061530.

The previous prime is 2811061501. The next prime is 2811061559. The reversal of 2811061531 is 1351601182.

It is an a-pointer prime, because the next prime (2811061559) can be obtained adding 2811061531 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2811061531 - 2¹¹ = 2811059483 is a prime.

It is a super-2 number, since 2×2811061531² = 15804133862136127922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2811061531.

It is not a weakly prime, because it can be changed into another prime (2811061501) 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, 1405530765 + 1405530766.

It is an arithmetic number, because the mean of its divisors is an integer number (1405530766).

Almost surely, 2^2811061531 is an apocalyptic number.

2811061531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2811061531 is an equidigital number, since it uses as much as digits as its factorization.

2811061531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 2811061531 is about 53019.4448386627. Note that the first 3 decimals coincide. The cubic root of 2811061531 is about 1411.3133531885.

The spelling of 2811061531 in words is "two billion, eight hundred eleven million, sixty-one thousand, five hundred thirty-one".