202131001 has 4 divisors (see below), whose sum is σ = 202694400. Its totient is φ = 201567604.

The previous prime is 202130993. The next prime is 202131019. The reversal of 202131001 is 100131202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100131202 = 2 ⋅50065601.

It is a cyclic number.

It is not a de Polignac number, because 202131001 - 2³ = 202130993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202131091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281161 + ... + 281878.

It is an arithmetic number, because the mean of its divisors is an integer number (50673600).

Almost surely, 2^202131001 is an apocalyptic number.

It is an amenable number.

202131001 is a deficient number, since it is larger than the sum of its proper divisors (563399).

202131001 is an equidigital number, since it uses as much as digits as its factorization.

202131001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563398.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 202131001 is about 14217.2782557000. The cubic root of 202131001 is about 586.8732423280.

Adding to 202131001 its reverse (100131202), we get a palindrome (302262203).

The spelling of 202131001 in words is "two hundred two million, one hundred thirty-one thousand, one".