231421671 has 48 divisors (see below), whose sum is σ = 380610720. Its totient is φ = 138827520.

The previous prime is 231421669. The next prime is 231421681. The reversal of 231421671 is 176124132.

231421671 is a `hidden beast` number, since 231 + 421 + 6 + 7 + 1 = 666.

It is not a de Polignac number, because 231421671 - 2¹ = 231421669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231421651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 186465 + ... + 187701.

It is an arithmetic number, because the mean of its divisors is an integer number (7929390).

Almost surely, 2^231421671 is an apocalyptic number.

231421671 is a deficient number, since it is larger than the sum of its proper divisors (149189049).

231421671 is a wasteful number, since it uses less digits than its factorization.

231421671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313 (or 1294 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 231421671 is about 15212.5497862784. The cubic root of 231421671 is about 613.9523627307.

The spelling of 231421671 in words is "two hundred thirty-one million, four hundred twenty-one thousand, six hundred seventy-one".