42220402031 has 4 divisors (see below), whose sum is σ = 42221349864. Its totient is φ = 42219454200.

The previous prime is 42220402009. The next prime is 42220402033. The reversal of 42220402031 is 13020402224.

42220402031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42220402031 is a prime.

It is a super-2 number, since 2×42220402031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42220401994 and 42220402012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42220402033) 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, 403625 + ... + 497346.

It is an arithmetic number, because the mean of its divisors is an integer number (10555337466).

Almost surely, 2^42220402031 is an apocalyptic number.

42220402031 is a deficient number, since it is larger than the sum of its proper divisors (947833).

42220402031 is an equidigital number, since it uses as much as digits as its factorization.

42220402031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947832.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 42220402031 its reverse (13020402224), we get a palindrome (55240804255).

The spelling of 42220402031 in words is "forty-two billion, two hundred twenty million, four hundred two thousand, thirty-one".