202031130845 has 18 divisors (see below), whose sum is σ = 246688517022. Its totient is φ = 158838864496.

The previous prime is 202031130841. The next prime is 202031130883. The reversal of 202031130845 is 548031130202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 161624904676 + 40406226169 = 402026^2 + 201013^2 .

It is not a de Polignac number, because 202031130845 - 2² = 202031130841 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 (202031130841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 59297132 + ... + 59300538.

Almost surely, 2^202031130845 is an apocalyptic number.

It is an amenable number.

202031130845 is a deficient number, since it is larger than the sum of its proper divisors (44657386177).

202031130845 is an frugal number, since it uses more digits than its factorization.

202031130845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6937 (or 3471 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 202031130845 in words is "two hundred two billion, thirty-one million, one hundred thirty thousand, eight hundred forty-five".