231535324130440 has 32 divisors (see below), whose sum is σ = 568313977412160. Its totient is φ = 84194663320000.

The previous prime is 231535324130431. The next prime is 231535324130491. The reversal of 231535324130440 is 44031423535132.

It is a super-2 number, since 2×231535324130440² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 231535324130393 and 231535324130402.

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, 263108322436 + ... + 263108323315.

It is an arithmetic number, because the mean of its divisors is an integer number (17759811794130).

Almost surely, 2^{231535324130440} is an apocalyptic number.

231535324130440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231535324130440 is an abundant number, since it is smaller than the sum of its proper divisors (336778653281720).

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

231535324130440 is a wasteful number, since it uses less digits than its factorization.

231535324130440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526216645773 (or 526216645769 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 40.

Adding to 231535324130440 its reverse (44031423535132), we get a palindrome (275566747665572).

The spelling of 231535324130440 in words is "two hundred thirty-one trillion, five hundred thirty-five billion, three hundred twenty-four million, one hundred thirty thousand, four hundred forty".