31542421103 has 12 divisors (see below), whose sum is σ = 31966108632. Its totient is φ = 31124056320.

The previous prime is 31542421093. The next prime is 31542421109. The reversal of 31542421103 is 30112424513.

It is a happy number.

It is not a de Polignac number, because 31542421103 - 2¹² = 31542417007 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 (31542421109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3260093 + ... + 3269753.

It is an arithmetic number, because the mean of its divisors is an integer number (2663842386).

Almost surely, 2^31542421103 is an apocalyptic number.

31542421103 is a deficient number, since it is larger than the sum of its proper divisors (423687529).

31542421103 is an frugal number, since it uses more digits than its factorization.

31542421103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10202 (or 10105 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 31542421103 its reverse (30112424513), we get a palindrome (61654845616).

The spelling of 31542421103 in words is "thirty-one billion, five hundred forty-two million, four hundred twenty-one thousand, one hundred three".