31003230133 has 2 divisors, whose sum is σ = 31003230134. Its totient is φ = 31003230132.

The previous prime is 31003230127. The next prime is 31003230199. The reversal of 31003230133 is 33103230013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30278436049 + 724794084 = 174007^2 + 26922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31003230133 is a prime.

It is a super-2 number, since 2×31003230133² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31003230133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31003230103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15501615066 + 15501615067.

It is an arithmetic number, because the mean of its divisors is an integer number (15501615067).

Almost surely, 2^31003230133 is an apocalyptic number.

It is an amenable number.

31003230133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31003230133 is an equidigital number, since it uses as much as digits as its factorization.

31003230133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 19.

Adding to 31003230133 its reverse (33103230013), we get a palindrome (64106460146).

The spelling of 31003230133 in words is "thirty-one billion, three million, two hundred thirty thousand, one hundred thirty-three".