231145442 has 8 divisors (see below), whose sum is σ = 378238032. Its totient is φ = 105066100.

The previous prime is 231145433. The next prime is 231145451. The reversal of 231145442 is 244541132.

It is an interprime number because it is at equal distance from previous prime (231145433) and next prime (231145451).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5253284 + ... + 5253327.

It is an arithmetic number, because the mean of its divisors is an integer number (47279754).

Almost surely, 2^231145442 is an apocalyptic number.

231145442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231145442 is a deficient number, since it is larger than the sum of its proper divisors (147092590).

231145442 is a wasteful number, since it uses less digits than its factorization.

231145442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10506624.

The product of its digits is 3840, while the sum is 26.

The square root of 231145442 is about 15203.4680911955. The cubic root of 231145442 is about 613.7079906759.

Adding to 231145442 its reverse (244541132), we get a palindrome (475686574).

The spelling of 231145442 in words is "two hundred thirty-one million, one hundred forty-five thousand, four hundred forty-two".