425544220431 has 20 divisors (see below), whose sum is σ = 693479471784. Its totient is φ = 257905587600.

The previous prime is 425544220333. The next prime is 425544220433. The reversal of 425544220431 is 134022445524.

425544220431 is a `hidden beast` number, since 4 + 2 + 5 + 5 + 442 + 204 + 3 + 1 = 666.

It is not a de Polignac number, because 425544220431 - 2¹³ = 425544212239 is a prime.

It is a super-2 number, since 2×425544220431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425544220433) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 238800580 + ... + 238802361.

Almost surely, 2^425544220431 is an apocalyptic number.

425544220431 is a deficient number, since it is larger than the sum of its proper divisors (267935251353).

425544220431 is a wasteful number, since it uses less digits than its factorization.

425544220431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477602964 (or 477602955 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

Adding to 425544220431 its reverse (134022445524), we get a palindrome (559566665955).

The spelling of 425544220431 in words is "four hundred twenty-five billion, five hundred forty-four million, two hundred twenty thousand, four hundred thirty-one".