42320212631 has 4 divisors (see below), whose sum is σ = 42328596264. Its totient is φ = 42311829000.

The previous prime is 42320212621. The next prime is 42320212657. The reversal of 42320212631 is 13621202324.

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-42320212631 is a prime.

It is a super-2 number, since 2×42320212631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42320212631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42320212621) 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, 4184240 + ... + 4194341.

It is an arithmetic number, because the mean of its divisors is an integer number (10582149066).

Almost surely, 2^42320212631 is an apocalyptic number.

42320212631 is a deficient number, since it is larger than the sum of its proper divisors (8383633).

42320212631 is an equidigital number, since it uses as much as digits as its factorization.

42320212631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8383632.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 42320212631 its reverse (13621202324), we get a palindrome (55941414955).

The spelling of 42320212631 in words is "forty-two billion, three hundred twenty million, two hundred twelve thousand, six hundred thirty-one".