22420031 has 4 divisors (see below), whose sum is σ = 22629672. Its totient is φ = 22210392.

The previous prime is 22420003. The next prime is 22420033. The reversal of 22420031 is 13002422.

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 22420031 - 2⁶ = 22419967 is a prime.

It is a super-2 number, since 2×22420031² = 1005315580081922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22419988 and 22420015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22420033) 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, 104660 + ... + 104873.

It is an arithmetic number, because the mean of its divisors is an integer number (5657418).

Almost surely, 2^22420031 is an apocalyptic number.

22420031 is a deficient number, since it is larger than the sum of its proper divisors (209641).

22420031 is a wasteful number, since it uses less digits than its factorization.

22420031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209640.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22420031 is about 4734.9795142112. The cubic root of 22420031 is about 281.9759507013.

Adding to 22420031 its reverse (13002422), we get a palindrome (35422453).

The spelling of 22420031 in words is "twenty-two million, four hundred twenty thousand, thirty-one".