31300133213 has 4 divisors (see below), whose sum is σ = 31464008448. Its totient is φ = 31136257980.

The previous prime is 31300133167. The next prime is 31300133233. The reversal of 31300133213 is 31233100313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31233100313 = 2113 ⋅14781401.

It is a cyclic number.

It is not a de Polignac number, because 31300133213 - 2¹⁴ = 31300116829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31300133233) 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, 81937331 + ... + 81937712.

It is an arithmetic number, because the mean of its divisors is an integer number (7866002112).

Almost surely, 2^31300133213 is an apocalyptic number.

It is an amenable number.

31300133213 is a deficient number, since it is larger than the sum of its proper divisors (163875235).

31300133213 is a wasteful number, since it uses less digits than its factorization.

31300133213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163875234.

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

Adding to 31300133213 its reverse (31233100313), we get a palindrome (62533233526).

The spelling of 31300133213 in words is "thirty-one billion, three hundred million, one hundred thirty-three thousand, two hundred thirteen".