42181290971 has 4 divisors (see below), whose sum is σ = 42194049432. Its totient is φ = 42168532512.

The previous prime is 42181290941. The next prime is 42181290997. The reversal of 42181290971 is 17909218124.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42181290971 - 2²⁶ = 42114182107 is a prime.

It is a super-2 number, since 2×42181290971² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42181290941) 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, 6374270 + ... + 6380883.

It is an arithmetic number, because the mean of its divisors is an integer number (10548512358).

Almost surely, 2^42181290971 is an apocalyptic number.

42181290971 is a deficient number, since it is larger than the sum of its proper divisors (12758461).

42181290971 is a wasteful number, since it uses less digits than its factorization.

42181290971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12758460.

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 42181290971 in words is "forty-two billion, one hundred eighty-one million, two hundred ninety thousand, nine hundred seventy-one".