521325030 has 16 divisors (see below), whose sum is σ = 1251180144. Its totient is φ = 139020000.

The previous prime is 521325023. The next prime is 521325037. The reversal of 521325030 is 30523125.

It is an interprime number because it is at equal distance from previous prime (521325023) and next prime (521325037).

It is a junction number, because it is equal to n+sod(n) for n = 521324988 and 521325006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521325037) 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, 8688721 + ... + 8688780.

It is an arithmetic number, because the mean of its divisors is an integer number (78198759).

Almost surely, 2^521325030 is an apocalyptic number.

521325030 is an abundant number, since it is smaller than the sum of its proper divisors (729855114).

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

521325030 is a wasteful number, since it uses less digits than its factorization.

521325030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17377511.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 521325030 is about 22832.5432223395. The cubic root of 521325030 is about 804.8275957582.

Adding to 521325030 its reverse (30523125), we get a palindrome (551848155).

The spelling of 521325030 in words is "five hundred twenty-one million, three hundred twenty-five thousand, thirty".