231657040 has 40 divisors (see below), whose sum is σ = 539260128. Its totient is φ = 92549760.

The previous prime is 231657029. The next prime is 231657061. The reversal of 231657040 is 40756132.

It is a tau number, because it is divible by the number of its divisors (40).

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, 102159 + ... + 104401.

Almost surely, 2^231657040 is an apocalyptic number.

231657040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231657040 is an abundant number, since it is smaller than the sum of its proper divisors (307603088).

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

231657040 is a wasteful number, since it uses less digits than its factorization.

231657040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547 (or 3541 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 231657040 is about 15220.2838344099. The cubic root of 231657040 is about 614.1604336957.

The spelling of 231657040 in words is "two hundred thirty-one million, six hundred fifty-seven thousand, forty".