231155643 has 8 divisors (see below), whose sum is σ = 309911056. Its totient is φ = 153252000.

The previous prime is 231155633. The next prime is 231155651. The reversal of 231155643 is 346551132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231155643 - 2⁹ = 231155131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231155643.

It is not an unprimeable number, because it can be changed into a prime (231155633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212308 + ... + 213393.

It is an arithmetic number, because the mean of its divisors is an integer number (38738882).

Almost surely, 2^231155643 is an apocalyptic number.

231155643 is a deficient number, since it is larger than the sum of its proper divisors (78755413).

231155643 is a wasteful number, since it uses less digits than its factorization.

231155643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425885.

The product of its digits is 10800, while the sum is 30.

The square root of 231155643 is about 15203.8035701597. The cubic root of 231155643 is about 613.7170186759.

The spelling of 231155643 in words is "two hundred thirty-one million, one hundred fifty-five thousand, six hundred forty-three".