431422031618 has 6 divisors (see below), whose sum is σ = 647134440771. Its totient is φ = 215710551362.

The previous prime is 431422031611. The next prime is 431422031627. The reversal of 431422031618 is 816130224134.

It can be written as a sum of positive squares in only one way, i.e., 215711015809 + 215711015809 = 464447^2 + 464447^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=464447.

It is a super-2 number, since 2×431422031618² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431422031611) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 696671 + ... + 1161117.

Almost surely, 2^431422031618 is an apocalyptic number.

431422031618 is a deficient number, since it is larger than the sum of its proper divisors (215712409153).

431422031618 is an frugal number, since it uses more digits than its factorization.

431422031618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928896 (or 464449 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 431422031618 in words is "four hundred thirty-one billion, four hundred twenty-two million, thirty-one thousand, six hundred eighteen".