231151830 has 128 divisors (see below), whose sum is σ = 687633408. Its totient is φ = 48425472.

The previous prime is 231151801. The next prime is 231151847. The reversal of 231151830 is 38151132.

It is a self number, because there is not a number n which added to its sum of digits gives 231151830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 619524 + ... + 619896.

It is an arithmetic number, because the mean of its divisors is an integer number (5372136).

Almost surely, 2^231151830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231151830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343816704).

231151830 is an abundant number, since it is smaller than the sum of its proper divisors (456481578).

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

231151830 is a wasteful number, since it uses less digits than its factorization.

231151830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 231151830 is about 15203.6781733895. The cubic root of 231151830 is about 613.7136441590.

The spelling of 231151830 in words is "two hundred thirty-one million, one hundred fifty-one thousand, eight hundred thirty".