202020131631 has 16 divisors (see below), whose sum is σ = 275293628928. Its totient is φ = 131717577600.

The previous prime is 202020131617. The next prime is 202020131653. The reversal of 202020131631 is 136131020202.

It is not a de Polignac number, because 202020131631 - 2⁹ = 202020131119 is a prime.

It is a super-2 number, since 2×202020131631² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202020131598 and 202020131607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020133631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334465 + ... + 718266.

It is an arithmetic number, because the mean of its divisors is an integer number (17205851808).

Almost surely, 2^202020131631 is an apocalyptic number.

202020131631 is a deficient number, since it is larger than the sum of its proper divisors (73273497297).

202020131631 is a wasteful number, since it uses less digits than its factorization.

202020131631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054142.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 202020131631 its reverse (136131020202), we get a palindrome (338151151833).

The spelling of 202020131631 in words is "two hundred two billion, twenty million, one hundred thirty-one thousand, six hundred thirty-one".