231143274 has 64 divisors (see below), whose sum is σ = 533537280. Its totient is φ = 74122560.

The previous prime is 231143257. The next prime is 231143299. The reversal of 231143274 is 472341132.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154072 + ... + 155564.

It is an arithmetic number, because the mean of its divisors is an integer number (8336520).

Almost surely, 2^231143274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231143274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266768640).

231143274 is an abundant number, since it is smaller than the sum of its proper divisors (302394006).

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

231143274 is a wasteful number, since it uses less digits than its factorization.

231143274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612 (or 1606 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 231143274 is about 15203.3967915068. The cubic root of 231143274 is about 613.7060719373.

The spelling of 231143274 in words is "two hundred thirty-one million, one hundred forty-three thousand, two hundred seventy-four".