424231138781 has 4 divisors (see below), whose sum is σ = 424234511964. Its totient is φ = 424227765600.

The previous prime is 424231138703. The next prime is 424231138823. The reversal of 424231138781 is 187831132424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88144265881 + 336086872900 = 296891^2 + 579730^2 .

It is a cyclic number.

It is not a de Polignac number, because 424231138781 - 2¹⁸ = 424230876637 is a prime.

It is a super-2 number, since 2×424231138781² (a number of 24 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 (424231138181) 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, 1490330 + ... + 1752011.

It is an arithmetic number, because the mean of its divisors is an integer number (106058627991).

Almost surely, 2^424231138781 is an apocalyptic number.

It is an amenable number.

424231138781 is a deficient number, since it is larger than the sum of its proper divisors (3373183).

424231138781 is a wasteful number, since it uses less digits than its factorization.

424231138781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373182.

The product of its digits is 258048, while the sum is 44.

The spelling of 424231138781 in words is "four hundred twenty-four billion, two hundred thirty-one million, one hundred thirty-eight thousand, seven hundred eighty-one".