31540321103 has 4 divisors (see below), whose sum is σ = 32557750848. Its totient is φ = 30522891360.

The previous prime is 31540321097. The next prime is 31540321121. The reversal of 31540321103 is 30112304513.

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

It is a cyclic number.

It is not a de Polignac number, because 31540321103 - 2⁶ = 31540321039 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 (31540320103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508714826 + ... + 508714887.

It is an arithmetic number, because the mean of its divisors is an integer number (8139437712).

Almost surely, 2^31540321103 is an apocalyptic number.

31540321103 is a deficient number, since it is larger than the sum of its proper divisors (1017429745).

31540321103 is a wasteful number, since it uses less digits than its factorization.

31540321103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017429744.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 31540321103 its reverse (30112304513), we get a palindrome (61652625616).

The spelling of 31540321103 in words is "thirty-one billion, five hundred forty million, three hundred twenty-one thousand, one hundred three".