22642031 has 4 divisors (see below), whose sum is σ = 22875552. Its totient is φ = 22408512.

The previous prime is 22642013. The next prime is 22642063. The reversal of 22642031 is 13024622.

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 22642031 - 2⁶ = 22641967 is a prime.

It is a super-2 number, since 2×22642031² = 1025323135609922, 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 = 22641994 and 22642012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22642001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116615 + ... + 116808.

It is an arithmetic number, because the mean of its divisors is an integer number (5718888).

Almost surely, 2^22642031 is an apocalyptic number.

22642031 is a deficient number, since it is larger than the sum of its proper divisors (233521).

22642031 is an equidigital number, since it uses as much as digits as its factorization.

22642031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233520.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 22642031 is about 4758.3643198057. The cubic root of 22642031 is about 282.9035910454.

Adding to 22642031 its reverse (13024622), we get a palindrome (35666653).

The spelling of 22642031 in words is "twenty-two million, six hundred forty-two thousand, thirty-one".