31421103 has 48 divisors (see below), whose sum is σ = 51464160. Its totient is φ = 16982784.

The previous prime is 31421101. The next prime is 31421107. The reversal of 31421103 is 30112413.

It is not a de Polignac number, because 31421103 - 2¹ = 31421101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 288213 + ... + 288321.

It is an arithmetic number, because the mean of its divisors is an integer number (1072170).

Almost surely, 2^31421103 is an apocalyptic number.

31421103 is a deficient number, since it is larger than the sum of its proper divisors (20043057).

31421103 is a wasteful number, since it uses less digits than its factorization.

31421103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31421103 is about 5605.4529700997. The cubic root of 31421103 is about 315.5540865161.

Adding to 31421103 its reverse (30112413), we get a palindrome (61533516).

The spelling of 31421103 in words is "thirty-one million, four hundred twenty-one thousand, one hundred three".