31142103 has 4 divisors (see below), whose sum is σ = 41522808. Its totient is φ = 20761400.

The previous prime is 31142101. The next prime is 31142117. The reversal of 31142103 is 30124113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30124113 = 3 ⋅10041371.

It is a cyclic number.

It is not a de Polignac number, because 31142103 - 2¹ = 31142101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31142101) 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, 5190348 + ... + 5190353.

It is an arithmetic number, because the mean of its divisors is an integer number (10380702).

Almost surely, 2^31142103 is an apocalyptic number.

31142103 is a deficient number, since it is larger than the sum of its proper divisors (10380705).

31142103 is a wasteful number, since it uses less digits than its factorization.

31142103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10380704.

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

The square root of 31142103 is about 5580.5109981076. The cubic root of 31142103 is about 314.6173332529.

Adding to 31142103 its reverse (30124113), we get a palindrome (61266216).

The spelling of 31142103 in words is "thirty-one million, one hundred forty-two thousand, one hundred three".