320202421 has 48 divisors (see below), whose sum is σ = 429770880. Its totient is φ = 232848000.

The previous prime is 320202397. The next prime is 320202437. The reversal of 320202421 is 124202023.

It is not a de Polignac number, because 320202421 - 2¹³ = 320194229 is a prime.

It is a super-2 number, since 2×320202421² = 205059180828522482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320202395 and 320202404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320202451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1625295 + ... + 1625491.

It is an arithmetic number, because the mean of its divisors is an integer number (8953560).

Almost surely, 2^320202421 is an apocalyptic number.

It is an amenable number.

320202421 is a deficient number, since it is larger than the sum of its proper divisors (109568459).

320202421 is a wasteful number, since it uses less digits than its factorization.

320202421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 320202421 is about 17894.2007644935. The cubic root of 320202421 is about 684.1345712050.

Adding to 320202421 its reverse (124202023), we get a palindrome (444404444).

The spelling of 320202421 in words is "three hundred twenty million, two hundred two thousand, four hundred twenty-one".