505525530 has 32 divisors (see below), whose sum is σ = 1216456704. Its totient is φ = 134451776.

The previous prime is 505525523. The next prime is 505525543. The reversal of 505525530 is 35525505.

It is a super-2 number, since 2×505525530² = 511112122963561800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10509 + ... + 33488.

It is an arithmetic number, because the mean of its divisors is an integer number (38014272).

Almost surely, 2^505525530 is an apocalyptic number.

505525530 is an abundant number, since it is smaller than the sum of its proper divisors (710931174).

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

505525530 is a wasteful number, since it uses less digits than its factorization.

505525530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44390.

The product of its (nonzero) digits is 18750, while the sum is 30.

The square root of 505525530 is about 22483.8949027965. The cubic root of 505525530 is about 796.6135655119.

The spelling of 505525530 in words is "five hundred five million, five hundred twenty-five thousand, five hundred thirty".