202220423431 has 4 divisors (see below), whose sum is σ = 217775840632. Its totient is φ = 186665006232.

The previous prime is 202220423423. The next prime is 202220423441. The reversal of 202220423431 is 134324022202.

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

It is a cyclic number.

It is not a de Polignac number, because 202220423431 - 2³ = 202220423423 is a prime.

It is a super-2 number, since 2×202220423431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202220423396 and 202220423405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202220423441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7777708581 + ... + 7777708606.

It is an arithmetic number, because the mean of its divisors is an integer number (54443960158).

Almost surely, 2^202220423431 is an apocalyptic number.

202220423431 is a deficient number, since it is larger than the sum of its proper divisors (15555417201).

202220423431 is a wasteful number, since it uses less digits than its factorization.

202220423431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15555417200.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 202220423431 its reverse (134324022202), we get a palindrome (336544445633).

The spelling of 202220423431 in words is "two hundred two billion, two hundred twenty million, four hundred twenty-three thousand, four hundred thirty-one".