231388650 has 240 divisors, whose sum is σ = 705788160. Its totient is φ = 55987200.

The previous prime is 231388637. The next prime is 231388657. The reversal of 231388650 is 56883132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231388657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2385402 + ... + 2385498.

It is an arithmetic number, because the mean of its divisors is an integer number (2940784).

Almost surely, 2^231388650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231388650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352894080).

231388650 is an abundant number, since it is smaller than the sum of its proper divisors (474399510).

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

231388650 is a wasteful number, since it uses less digits than its factorization.

231388650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 231388650 is about 15211.4644265436. The cubic root of 231388650 is about 613.9231602145.

The spelling of 231388650 in words is "two hundred thirty-one million, three hundred eighty-eight thousand, six hundred fifty".