42945285431 has 4 divisors (see below), whose sum is σ = 42953094912. Its totient is φ = 42937475952.

The previous prime is 42945285421. The next prime is 42945285443. The reversal of 42945285431 is 13458254924.

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 42945285431 - 2⁶ = 42945285367 is a prime.

It is a super-2 number, since 2×42945285431² (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 (42945285421) 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, 3896486 + ... + 3907491.

It is an arithmetic number, because the mean of its divisors is an integer number (10738273728).

Almost surely, 2^42945285431 is an apocalyptic number.

42945285431 is a deficient number, since it is larger than the sum of its proper divisors (7809481).

42945285431 is an equidigital number, since it uses as much as digits as its factorization.

42945285431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7809480.

The product of its digits is 1382400, while the sum is 47.

The spelling of 42945285431 in words is "forty-two billion, nine hundred forty-five million, two hundred eighty-five thousand, four hundred thirty-one".