31321300133 has 4 divisors (see below), whose sum is σ = 31340719788. Its totient is φ = 31301880480.

The previous prime is 31321300121. The next prime is 31321300159. The reversal of 31321300133 is 33100312313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24969688324 + 6351611809 = 158018^2 + 79697^2 .

It is a cyclic number.

It is not a de Polignac number, because 31321300133 - 2⁶ = 31321300069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321300193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9707408 + ... + 9710633.

It is an arithmetic number, because the mean of its divisors is an integer number (7835179947).

Almost surely, 2^31321300133 is an apocalyptic number.

It is an amenable number.

31321300133 is a deficient number, since it is larger than the sum of its proper divisors (19419655).

31321300133 is a wasteful number, since it uses less digits than its factorization.

31321300133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19419654.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 31321300133 its reverse (33100312313), we get a palindrome (64421612446).

The spelling of 31321300133 in words is "thirty-one billion, three hundred twenty-one million, three hundred thousand, one hundred thirty-three".