521442024240 has 80 divisors (see below), whose sum is σ = 1616567390208. Its totient is φ = 139042852608.

The previous prime is 521442024223. The next prime is 521442024247. The reversal of 521442024240 is 42420244125.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 521442024198 and 521442024207.

It is not an unprimeable number, because it can be changed into a prime (521442024247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4644447 + ... + 4755393.

Almost surely, 2^521442024240 is an apocalyptic number.

It is an amenable number.

521442024240 is an abundant number, since it is smaller than the sum of its proper divisors (1095125365968).

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

521442024240 is a wasteful number, since it uses less digits than its factorization.

521442024240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130546 (or 130540 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 30.

Adding to 521442024240 its reverse (42420244125), we get a palindrome (563862268365).

The spelling of 521442024240 in words is "five hundred twenty-one billion, four hundred forty-two million, twenty-four thousand, two hundred forty".