231201318 has 16 divisors (see below), whose sum is σ = 462689136. Its totient is φ = 77019360.

The previous prime is 231201307. The next prime is 231201349. The reversal of 231201318 is 813102132.

It is a junction number, because it is equal to n+sod(n) for n = 231201294 and 231201303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621 + ... + 21512.

It is an arithmetic number, because the mean of its divisors is an integer number (28918071).

Almost surely, 2^231201318 is an apocalyptic number.

231201318 is an abundant number, since it is smaller than the sum of its proper divisors (231487818).

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

231201318 is a wasteful number, since it uses less digits than its factorization.

231201318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23879.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 231201318 is about 15205.3055871955. The cubic root of 231201318 is about 613.7574383088.

The spelling of 231201318 in words is "two hundred thirty-one million, two hundred one thousand, three hundred eighteen".