31040533 has 2 divisors, whose sum is σ = 31040534. Its totient is φ = 31040532.

The previous prime is 31040489. The next prime is 31040543. The reversal of 31040533 is 33504013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30547729 + 492804 = 5527^2 + 702^2 .

It is an emirp because it is prime and its reverse (33504013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31040533 - 2¹³ = 31032341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31040533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31040543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15520266 + 15520267.

It is an arithmetic number, because the mean of its divisors is an integer number (15520267).

Almost surely, 2^31040533 is an apocalyptic number.

It is an amenable number.

31040533 is a deficient number, since it is larger than the sum of its proper divisors (1).

31040533 is an equidigital number, since it uses as much as digits as its factorization.

31040533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 31040533 is about 5571.4031446306. The cubic root of 31040533 is about 314.2749191392.

Adding to 31040533 its reverse (33504013), we get a palindrome (64544546).

The spelling of 31040533 in words is "thirty-one million, forty thousand, five hundred thirty-three".