42218605431 has 28 divisors (see below), whose sum is σ = 63446289120. Its totient is φ = 28080224640.

The previous prime is 42218605427. The next prime is 42218605441. The reversal of 42218605431 is 13450681224.

It is a happy number.

42218605431 is a `hidden beast` number, since 4 + 2 + 2 + 1 + 8 + 605 + 43 + 1 = 666.

It is not a de Polignac number, because 42218605431 - 2² = 42218605427 is a prime.

It is a super-2 number, since 2×42218605431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42218605441) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 247015 + ... + 381383.

Almost surely, 2^42218605431 is an apocalyptic number.

42218605431 is a deficient number, since it is larger than the sum of its proper divisors (21227683689).

42218605431 is an equidigital number, since it uses as much as digits as its factorization.

42218605431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134818 (or 134803 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 42218605431 in words is "forty-two billion, two hundred eighteen million, six hundred five thousand, four hundred thirty-one".