42404220031 has 2 divisors, whose sum is σ = 42404220032. Its totient is φ = 42404220030.

The previous prime is 42404220017. The next prime is 42404220097. The reversal of 42404220031 is 13002240424.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42404220031 - 2³¹ = 40256736383 is a prime.

It is a super-2 number, since 2×42404220031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42404219984 and 42404220011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42404220631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21202110015 + 21202110016.

It is an arithmetic number, because the mean of its divisors is an integer number (21202110016).

Almost surely, 2^42404220031 is an apocalyptic number.

42404220031 is a deficient number, since it is larger than the sum of its proper divisors (1).

42404220031 is an equidigital number, since it uses as much as digits as its factorization.

42404220031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 42404220031 its reverse (13002240424), we get a palindrome (55406460455).

The spelling of 42404220031 in words is "forty-two billion, four hundred four million, two hundred twenty thousand, thirty-one".