42421143231 has 32 divisors (see below), whose sum is σ = 66168960000. Its totient is φ = 26786173824.

The previous prime is 42421143209. The next prime is 42421143253. The reversal of 42421143231 is 13234112424.

42421143231 is a `hidden beast` number, since 4 + 2 + 421 + 1 + 4 + 3 + 231 = 666.

It is an interprime number because it is at equal distance from previous prime (42421143209) and next prime (42421143253).

It is not a de Polignac number, because 42421143231 - 2²⁷ = 42286925503 is a prime.

It is a super-2 number, since 2×42421143231² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 42421143195 and 42421143204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42421143931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3514695 + ... + 3526743.

It is an arithmetic number, because the mean of its divisors is an integer number (2067780000).

Almost surely, 2^42421143231 is an apocalyptic number.

42421143231 is a deficient number, since it is larger than the sum of its proper divisors (23747816769).

42421143231 is a wasteful number, since it uses less digits than its factorization.

42421143231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18940 (or 18934 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 42421143231 its reverse (13234112424), we get a palindrome (55655255655).

The spelling of 42421143231 in words is "forty-two billion, four hundred twenty-one million, one hundred forty-three thousand, two hundred thirty-one".