42166163431 has 4 divisors (see below), whose sum is σ = 48189901072. Its totient is φ = 36142425792.

The previous prime is 42166163399. The next prime is 42166163437. The reversal of 42166163431 is 13436166124.

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 42166163431 - 2⁵ = 42166163399 is a prime.

It is a super-2 number, since 2×42166163431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42166163437) 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, 3011868810 + ... + 3011868823.

It is an arithmetic number, because the mean of its divisors is an integer number (12047475268).

Almost surely, 2^42166163431 is an apocalyptic number.

42166163431 is a deficient number, since it is larger than the sum of its proper divisors (6023737641).

42166163431 is an equidigital number, since it uses as much as digits as its factorization.

42166163431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023737640.

The product of its digits is 62208, while the sum is 37.

The spelling of 42166163431 in words is "forty-two billion, one hundred sixty-six million, one hundred sixty-three thousand, four hundred thirty-one".