20221131 has 8 divisors (see below), whose sum is σ = 30813184. Its totient is φ = 11554920.

The previous prime is 20221127. The next prime is 20221133. The reversal of 20221131 is 13112202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20221131 - 2² = 20221127 is a prime.

It is a super-2 number, since 2×20221131² = 817788277838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20221133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481435 + ... + 481476.

It is an arithmetic number, because the mean of its divisors is an integer number (3851648).

Almost surely, 2^20221131 is an apocalyptic number.

20221131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20221131 is a deficient number, since it is larger than the sum of its proper divisors (10592053).

20221131 is an equidigital number, since it uses as much as digits as its factorization.

20221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962921.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20221131 is about 4496.7911892815. The cubic root of 20221131 is about 272.4385002756.

Adding to 20221131 its reverse (13112202), we get a palindrome (33333333).

The spelling of 20221131 in words is "twenty million, two hundred twenty-one thousand, one hundred thirty-one".