4000231012520 has 32 divisors (see below), whose sum is σ = 9170340910920. Its totient is φ = 1569901981440.

The previous prime is 4000231012513. The next prime is 4000231012529. The reversal of 4000231012520 is 252101320004.

It can be written as a sum of positive squares in 4 ways, for example, as 3831673141156 + 168557871364 = 1957466^2 + 410558^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 4000231012492 and 4000231012501.

It is not an unprimeable number, because it can be changed into a prime (4000231012529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 943448591 + ... + 943452830.

Almost surely, 2^{4000231012520} is an apocalyptic number.

4000231012520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4000231012520 is an abundant number, since it is smaller than the sum of its proper divisors (5170109898400).

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

4000231012520 is a wasteful number, since it uses less digits than its factorization.

4000231012520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886901485 (or 1886901481 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 4000231012520 its reverse (252101320004), we get a palindrome (4252332332524).

The spelling of 4000231012520 in words is "four trillion, two hundred thirty-one million, twelve thousand, five hundred twenty".