231854436 has 72 divisors (see below), whose sum is σ = 651478464. Its totient is φ = 68927040.

The previous prime is 231854423. The next prime is 231854453. The reversal of 231854436 is 634458132.

231854436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 231854436.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15465 + ... + 26511.

It is an arithmetic number, because the mean of its divisors is an integer number (9048312).

Almost surely, 2^231854436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231854436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325739232).

231854436 is an abundant number, since it is smaller than the sum of its proper divisors (419624028).

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

231854436 is a wasteful number, since it uses less digits than its factorization.

231854436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11121 (or 11116 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 231854436 is about 15226.7670895696. The cubic root of 231854436 is about 614.3348271222.

The spelling of 231854436 in words is "two hundred thirty-one million, eight hundred fifty-four thousand, four hundred thirty-six".