202131812628 has 36 divisors (see below), whose sum is σ = 511012674900. Its totient is φ = 67368254976.

The previous prime is 202131812609. The next prime is 202131812629. The reversal of 202131812628 is 826218131202.

It is a happy number.

202131812628 is a `hidden beast` number, since 2 + 0 + 2 + 1 + 3 + 18 + 12 + 628 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 113715979524 + 88415833104 = 337218^2 + 297348^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 202131812592 and 202131812601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202131812629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100125 + ... + 643652.

It is an arithmetic number, because the mean of its divisors is an integer number (14194796525).

Almost surely, 2^202131812628 is an apocalyptic number.

It is an amenable number.

202131812628 is an abundant number, since it is smaller than the sum of its proper divisors (308880862272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202131812628 is a wasteful number, since it uses less digits than its factorization.

202131812628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751336 (or 751331 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The spelling of 202131812628 in words is "two hundred two billion, one hundred thirty-one million, eight hundred twelve thousand, six hundred twenty-eight".