520145250 has 32 divisors (see below), whose sum is σ = 1298284416. Its totient is φ = 138705200.

The previous prime is 520145237. The next prime is 520145251. The reversal of 520145250 is 52541025.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 520145250.

It is not an unprimeable number, because it can be changed into a prime (520145251) 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, 346014 + ... + 347513.

It is an arithmetic number, because the mean of its divisors is an integer number (40571388).

Almost surely, 2^520145250 is an apocalyptic number.

520145250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

520145250 is an abundant number, since it is smaller than the sum of its proper divisors (778139166).

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

520145250 is a wasteful number, since it uses less digits than its factorization.

520145250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693547 (or 693537 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 520145250 is about 22806.6930965451. The cubic root of 520145250 is about 804.2200178778.

Adding to 520145250 its reverse (52541025), we get a palindrome (572686275).

The spelling of 520145250 in words is "five hundred twenty million, one hundred forty-five thousand, two hundred fifty".