501021325530 has 128 divisors (see below), whose sum is σ = 1493066131200. Its totient is φ = 118497254400.

The previous prime is 501021325513. The next prime is 501021325537. The reversal of 501021325530 is 35523120105.

It is a happy number.

501021325530 is a `hidden beast` number, since 5 + 0 + 102 + 1 + 3 + 2 + 553 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 501021325494 and 501021325503.

It is not an unprimeable number, because it can be changed into a prime (501021325537) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1935475 + ... + 2179014.

It is an arithmetic number, because the mean of its divisors is an integer number (11664579150).

Almost surely, 2^501021325530 is an apocalyptic number.

501021325530 is an abundant number, since it is smaller than the sum of its proper divisors (992044805670).

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

501021325530 is a wasteful number, since it uses less digits than its factorization.

501021325530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4114557 (or 4114551 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 501021325530 its reverse (35523120105), we get a palindrome (536544445635).

The spelling of 501021325530 in words is "five hundred one billion, twenty-one million, three hundred twenty-five thousand, five hundred thirty".