231801442 has 8 divisors (see below), whose sum is σ = 353595600. Its totient is φ = 113936244.

The previous prime is 231801419. The next prime is 231801457. The reversal of 231801442 is 244108132.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982092 + ... + 982327.

It is an arithmetic number, because the mean of its divisors is an integer number (44199450).

Almost surely, 2^231801442 is an apocalyptic number.

231801442 is a deficient number, since it is larger than the sum of its proper divisors (121794158).

231801442 is a wasteful number, since it uses less digits than its factorization.

231801442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964480.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 231801442 is about 15225.0268308466. The cubic root of 231801442 is about 614.2880182406.

Adding to 231801442 its reverse (244108132), we get a palindrome (475909574).

The spelling of 231801442 in words is "two hundred thirty-one million, eight hundred one thousand, four hundred forty-two".