231533234333040 has 80 divisors (see below), whose sum is σ = 717950702785536. Its totient is φ = 61725191404800.

The previous prime is 231533234333039. The next prime is 231533234333087. The reversal of 231533234333040 is 40333432335132.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×231533234333040² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231533234333040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131973756 + ... + 133716635.

Almost surely, 2^{231533234333040} is an apocalyptic number.

231533234333040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231533234333040 is an abundant number, since it is smaller than the sum of its proper divisors (486417468452496).

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

231533234333040 is a wasteful number, since it uses less digits than its factorization.

231533234333040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265694038 (or 265694032 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 39.

Adding to 231533234333040 its reverse (40333432335132), we get a palindrome (271866666668172).

The spelling of 231533234333040 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, two hundred thirty-four million, three hundred thirty-three thousand, forty".