231420042 has 48 divisors (see below), whose sum is σ = 584750400. Its totient is φ = 66118248.

The previous prime is 231420011. The next prime is 231420047. The reversal of 231420042 is 240024132.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231419997 and 231420024.

It is not an unprimeable number, because it can be changed into a prime (231420047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12568 + ... + 24915.

It is an arithmetic number, because the mean of its divisors is an integer number (12182300).

Almost surely, 2^231420042 is an apocalyptic number.

231420042 is an abundant number, since it is smaller than the sum of its proper divisors (353330358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231420042 is a wasteful number, since it uses less digits than its factorization.

231420042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37512 (or 37495 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 231420042 is about 15212.4962448640. The cubic root of 231420042 is about 613.9509221702.

Adding to 231420042 its reverse (240024132), we get a palindrome (471444174).

The spelling of 231420042 in words is "two hundred thirty-one million, four hundred twenty thousand, forty-two".