231442047 has 12 divisors (see below), whose sum is σ = 338885664. Its totient is φ = 152180640.

The previous prime is 231442033. The next prime is 231442049. The reversal of 231442047 is 740244132.

231442047 is a `hidden beast` number, since 231 + 4 + 420 + 4 + 7 = 666.

It is not a de Polignac number, because 231442047 - 2¹⁹ = 230917759 is a prime.

It is a super-2 number, since 2×231442047² = 107130842239100418, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231442047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231442049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 175479 + ... + 176792.

It is an arithmetic number, because the mean of its divisors is an integer number (28240472).

Almost surely, 2^231442047 is an apocalyptic number.

231442047 is a deficient number, since it is larger than the sum of its proper divisors (107443617).

231442047 is a wasteful number, since it uses less digits than its factorization.

231442047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352350 (or 352347 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 231442047 is about 15213.2194817534. The cubic root of 231442047 is about 613.9703811040.

Adding to 231442047 its reverse (740244132), we get a palindrome (971686179).

The spelling of 231442047 in words is "two hundred thirty-one million, four hundred forty-two thousand, forty-seven".