31142203 has 4 divisors (see below), whose sum is σ = 31607080. Its totient is φ = 30677328.

The previous prime is 31142183. The next prime is 31142213. The reversal of 31142203 is 30224113.

It is a happy number.

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 31142203 - 2¹⁷ = 31011131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31142213) 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, 232338 + ... + 232471.

It is an arithmetic number, because the mean of its divisors is an integer number (7901770).

Almost surely, 2^31142203 is an apocalyptic number.

31142203 is a deficient number, since it is larger than the sum of its proper divisors (464877).

31142203 is an equidigital number, since it uses as much as digits as its factorization.

31142203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464876.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31142203 is about 5580.5199578534. The cubic root of 31142203 is about 314.6176700071.

Adding to 31142203 its reverse (30224113), we get a palindrome (61366316).

The spelling of 31142203 in words is "thirty-one million, one hundred forty-two thousand, two hundred three".