231457140 has 144 divisors (see below), whose sum is σ = 726485760. Its totient is φ = 59616000.

The previous prime is 231457139. The next prime is 231457151. The reversal of 231457140 is 41754132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 922015 + ... + 922265.

It is an arithmetic number, because the mean of its divisors is an integer number (5045040).

Almost surely, 2^231457140 is an apocalyptic number.

231457140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231457140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363242880).

231457140 is an abundant number, since it is smaller than the sum of its proper divisors (495028620).

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

231457140 is a wasteful number, since it uses less digits than its factorization.

231457140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 231457140 is about 15213.7155225145. The cubic root of 231457140 is about 613.9837270707.

The spelling of 231457140 in words is "two hundred thirty-one million, four hundred fifty-seven thousand, one hundred forty".