31003132103 has 4 divisors (see below), whose sum is σ = 31200604440. Its totient is φ = 30805659768.

The previous prime is 31003132091. The next prime is 31003132133. The reversal of 31003132103 is 30123130013.

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-31003132103 is a prime.

It is a super-2 number, since 2×31003132103² (a number of 22 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 (31003132133) 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, 98735933 + ... + 98736246.

It is an arithmetic number, because the mean of its divisors is an integer number (7800151110).

Almost surely, 2^31003132103 is an apocalyptic number.

31003132103 is a deficient number, since it is larger than the sum of its proper divisors (197472337).

31003132103 is a wasteful number, since it uses less digits than its factorization.

31003132103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197472336.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 31003132103 its reverse (30123130013), we get a palindrome (61126262116).

The spelling of 31003132103 in words is "thirty-one billion, three million, one hundred thirty-two thousand, one hundred three".