231056238 has 64 divisors (see below), whose sum is σ = 546416640. Its totient is φ = 63763200.

The previous prime is 231056233. The next prime is 231056261. The reversal of 231056238 is 832650132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231056233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187083 + ... + 188313.

It is an arithmetic number, because the mean of its divisors is an integer number (8537760).

Almost surely, 2^231056238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231056238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273208320).

231056238 is an abundant number, since it is smaller than the sum of its proper divisors (315360402).

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

231056238 is a wasteful number, since it uses less digits than its factorization.

231056238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 231056238 is about 15200.5341353520. The cubic root of 231056238 is about 613.6290328113.

The spelling of 231056238 in words is "two hundred thirty-one million, fifty-six thousand, two hundred thirty-eight".