20220331 has 2 divisors, whose sum is σ = 20220332. Its totient is φ = 20220330.

The previous prime is 20220323. The next prime is 20220349. The reversal of 20220331 is 13302202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20220331 - 2³ = 20220323 is a prime.

It is a super-2 number, since 2×20220331² = 817723571499122, which contains 22 as substring.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (20220311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110165 + 10110166.

It is an arithmetic number, because the mean of its divisors is an integer number (10110166).

Almost surely, 2^20220331 is an apocalyptic number.

20220331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220331 is an equidigital number, since it uses as much as digits as its factorization.

20220331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20220331 is about 4496.7022360837. The cubic root of 20220331 is about 272.4349074387.

Adding to 20220331 its reverse (13302202), we get a palindrome (33522533).

The spelling of 20220331 in words is "twenty million, two hundred twenty thousand, three hundred thirty-one".