42031333181 has 2 divisors, whose sum is σ = 42031333182. Its totient is φ = 42031333180.

The previous prime is 42031333153. The next prime is 42031333231. The reversal of 42031333181 is 18133313024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34608649156 + 7422684025 = 186034^2 + 86155^2 .

It is a cyclic number.

It is not a de Polignac number, because 42031333181 - 2⁶ = 42031333117 is a prime.

It is a super-3 number, since 3×42031333181³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42031333111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21015666590 + 21015666591.

It is an arithmetic number, because the mean of its divisors is an integer number (21015666591).

Almost surely, 2^42031333181 is an apocalyptic number.

It is an amenable number.

42031333181 is a deficient number, since it is larger than the sum of its proper divisors (1).

42031333181 is an equidigital number, since it uses as much as digits as its factorization.

42031333181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 42031333181 in words is "forty-two billion, thirty-one million, three hundred thirty-three thousand, one hundred eighty-one".