202131103 has 4 divisors (see below), whose sum is σ = 202161960. Its totient is φ = 202100248.

The previous prime is 202131091. The next prime is 202131113. The reversal of 202131103 is 301131202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202131103 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 (202131113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1273 + ... + 20146.

It is an arithmetic number, because the mean of its divisors is an integer number (50540490).

Almost surely, 2^202131103 is an apocalyptic number.

202131103 is a deficient number, since it is larger than the sum of its proper divisors (30857).

202131103 is an equidigital number, since it uses as much as digits as its factorization.

202131103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30856.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 202131103 is about 14217.2818428840. The cubic root of 202131103 is about 586.8733410446.

Adding to 202131103 its reverse (301131202), we get a palindrome (503262305).

Subtracting 202131103 from its reverse (301131202), we obtain a palindrome (99000099).

It can be divided in two parts, 20213 and 1103, that added together give a square (21316 = 146²).

The spelling of 202131103 in words is "two hundred two million, one hundred thirty-one thousand, one hundred three".