31131330223 has 8 divisors (see below), whose sum is σ = 37671525792. Its totient is φ = 25114350336.

The previous prime is 31131330221. The next prime is 31131330233. The reversal of 31131330223 is 32203313113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31131330223 - 2¹ = 31131330221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31131330194 and 31131330203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31131330221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130803790 + ... + 130804027.

It is an arithmetic number, because the mean of its divisors is an integer number (4708940724).

Almost surely, 2^31131330223 is an apocalyptic number.

31131330223 is a deficient number, since it is larger than the sum of its proper divisors (6540195569).

31131330223 is a wasteful number, since it uses less digits than its factorization.

31131330223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261607841.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31131330223 its reverse (32203313113), we get a palindrome (63334643336).

The spelling of 31131330223 in words is "thirty-one billion, one hundred thirty-one million, three hundred thirty thousand, two hundred twenty-three".