42402002231 has 2 divisors, whose sum is σ = 42402002232. Its totient is φ = 42402002230.

The previous prime is 42402002221. The next prime is 42402002249. The reversal of 42402002231 is 13220020424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42402002231 - 2¹⁰ = 42402001207 is a prime.

It is a super-2 number, since 2×42402002231² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42402002221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21201001115 + 21201001116.

It is an arithmetic number, because the mean of its divisors is an integer number (21201001116).

Almost surely, 2^42402002231 is an apocalyptic number.

42402002231 is a deficient number, since it is larger than the sum of its proper divisors (1).

42402002231 is an equidigital number, since it uses as much as digits as its factorization.

42402002231 is an odious number, because the sum of its binary digits is odd.

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

Adding to 42402002231 its reverse (13220020424), we get a palindrome (55622022655).

The spelling of 42402002231 in words is "forty-two billion, four hundred two million, two thousand, two hundred thirty-one".