231442001000 has 128 divisors (see below), whose sum is σ = 638908508160. Its totient is φ = 76791744000.

The previous prime is 231442000991. The next prime is 231442001009. The reversal of 231442001000 is 100244132.

It is an interprime number because it is at equal distance from previous prime (231442000991) and next prime (231442001009).

It is a self number, because there is not a number n which added to its sum of digits gives 231442001000.

It is not an unprimeable number, because it can be changed into a prime (231442001009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316277 + ... + 750276.

It is an arithmetic number, because the mean of its divisors is an integer number (4991472720).

Almost surely, 2^231442001000 is an apocalyptic number.

231442001000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231442001000 is an abundant number, since it is smaller than the sum of its proper divisors (407466507160).

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

231442001000 is a wasteful number, since it uses less digits than its factorization.

231442001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066612 (or 1066598 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 231442001000 its reverse (100244132), we get a palindrome (231542245132).

The spelling of 231442001000 in words is "two hundred thirty-one billion, four hundred forty-two million, one thousand".