231428216 has 16 divisors (see below), whose sum is σ = 434805000. Its totient is φ = 115480224.

The previous prime is 231428173. The next prime is 231428233. The reversal of 231428216 is 612824132.

It is a happy number.

231428216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24995 + ... + 32978.

Almost surely, 2^231428216 is an apocalyptic number.

It is an amenable number.

231428216 is a deficient number, since it is larger than the sum of its proper divisors (203376784).

231428216 is a wasteful number, since it uses less digits than its factorization.

231428216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58478 (or 58474 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 231428216 is about 15212.7649031989. The cubic root of 231428216 is about 613.9581505498.

The spelling of 231428216 in words is "two hundred thirty-one million, four hundred twenty-eight thousand, two hundred sixteen".