31100203004231 has 4 divisors (see below), whose sum is σ = 31291001795832. Its totient is φ = 30909404212632.

The previous prime is 31100203004219. The next prime is 31100203004237. The reversal of 31100203004231 is 13240030200113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31100203004231 is a prime.

It is a super-2 number, since 2×31100203004231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31100203004237) 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, 95399395556 + ... + 95399395881.

It is an arithmetic number, because the mean of its divisors is an integer number (7822750448958).

Almost surely, 2^{31100203004231} is an apocalyptic number.

31100203004231 is a deficient number, since it is larger than the sum of its proper divisors (190798791601).

31100203004231 is a wasteful number, since it uses less digits than its factorization.

31100203004231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190798791600.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31100203004231 its reverse (13240030200113), we get a palindrome (44340233204344).

The spelling of 31100203004231 in words is "thirty-one trillion, one hundred billion, two hundred three million, four thousand, two hundred thirty-one".