31530840533 has 2 divisors, whose sum is σ = 31530840534. Its totient is φ = 31530840532.

The previous prime is 31530840431. The next prime is 31530840563. The reversal of 31530840533 is 33504803513.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31493116369 + 37724164 = 177463^2 + 6142^2 .

It is a cyclic number.

It is not a de Polignac number, because 31530840533 - 2¹⁸ = 31530578389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31530840493 and 31530840502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31530840563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15765420266 + 15765420267.

It is an arithmetic number, because the mean of its divisors is an integer number (15765420267).

Almost surely, 2^31530840533 is an apocalyptic number.

It is an amenable number.

31530840533 is a deficient number, since it is larger than the sum of its proper divisors (1).

31530840533 is an equidigital number, since it uses as much as digits as its factorization.

31530840533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 31530840533 in words is "thirty-one billion, five hundred thirty million, eight hundred forty thousand, five hundred thirty-three".