31103213133 has 8 divisors (see below), whose sum is σ = 41566728448. Its totient is φ = 20687586624.

The previous prime is 31103213131. The next prime is 31103213147. The reversal of 31103213133 is 33131230113.

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

It is not a de Polignac number, because 31103213133 - 2¹ = 31103213131 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 (31103213131) 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, 11970685 + ... + 11973282.

It is an arithmetic number, because the mean of its divisors is an integer number (5195841056).

Almost surely, 2^31103213133 is an apocalyptic number.

It is an amenable number.

31103213133 is a deficient number, since it is larger than the sum of its proper divisors (10463515315).

31103213133 is a wasteful number, since it uses less digits than its factorization.

31103213133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23944403.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 31103213133 its reverse (33131230113), we get a palindrome (64234443246).

The spelling of 31103213133 in words is "thirty-one billion, one hundred three million, two hundred thirteen thousand, one hundred thirty-three".