231986274 has 32 divisors (see below), whose sum is σ = 503280960. Its totient is φ = 70863552.

The previous prime is 231986273. The next prime is 231986281. The reversal of 231986274 is 472689132.

It is not an unprimeable number, because it can be changed into a prime (231986273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144 + ... + 21540.

It is an arithmetic number, because the mean of its divisors is an integer number (15727530).

Almost surely, 2^231986274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231986274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251640480).

231986274 is an abundant number, since it is smaller than the sum of its proper divisors (271294686).

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

231986274 is a wasteful number, since it uses less digits than its factorization.

231986274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21554.

The product of its digits is 145152, while the sum is 42.

The square root of 231986274 is about 15231.0956270388. The cubic root of 231986274 is about 614.4512469037.

The spelling of 231986274 in words is "two hundred thirty-one million, nine hundred eighty-six thousand, two hundred seventy-four".