20220131 has 4 divisors (see below), whose sum is σ = 20521992. Its totient is φ = 19918272.

The previous prime is 20220127. The next prime is 20220133. The reversal of 20220131 is 13102202.

It is a happy number.

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 20220131 - 2² = 20220127 is a prime.

It is a super-2 number, since 2×20220131² = 817707395314322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20220133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150830 + ... + 150963.

It is an arithmetic number, because the mean of its divisors is an integer number (5130498).

Almost surely, 2^20220131 is an apocalyptic number.

20220131 is a deficient number, since it is larger than the sum of its proper divisors (301861).

20220131 is an equidigital number, since it uses as much as digits as its factorization.

20220131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301860.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20220131 is about 4496.6799975093. The cubic root of 20220131 is about 272.4340092147.

Adding to 20220131 its reverse (13102202), we get a palindrome (33322333).

The spelling of 20220131 in words is "twenty million, two hundred twenty thousand, one hundred thirty-one".