231545214 has 12 divisors (see below), whose sum is σ = 501681336. Its totient is φ = 77181732.

The previous prime is 231545201. The next prime is 231545243. The reversal of 231545214 is 412545132.

It is a super-2 number, since 2×231545214² = 107226372252611592, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 6431794 + ... + 6431829.

It is an arithmetic number, because the mean of its divisors is an integer number (41806778).

Almost surely, 2^231545214 is an apocalyptic number.

231545214 is an abundant number, since it is smaller than the sum of its proper divisors (270136122).

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

231545214 is a wasteful number, since it uses less digits than its factorization.

231545214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12863631 (or 12863628 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 231545214 is about 15216.6098063925. The cubic root of 231545214 is about 614.0615948280.

The spelling of 231545214 in words is "two hundred thirty-one million, five hundred forty-five thousand, two hundred fourteen".