231465040 has 20 divisors (see below), whose sum is σ = 538156404. Its totient is φ = 92585984.

The previous prime is 231464977. The next prime is 231465071. The reversal of 231465040 is 40564132.

It can be written as a sum of positive squares in 2 ways, for example, as 26173456 + 205291584 = 5116^2 + 14328^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 231464996 and 231465014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1446577 + ... + 1446736.

Almost surely, 2^231465040 is an apocalyptic number.

231465040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231465040 is an abundant number, since it is smaller than the sum of its proper divisors (306691364).

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

231465040 is a wasteful number, since it uses less digits than its factorization.

231465040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893326 (or 2893320 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 231465040 is about 15213.9751544427. The cubic root of 231465040 is about 613.9907124047.

The spelling of 231465040 in words is "two hundred thirty-one million, four hundred sixty-five thousand, forty".