525107220 has 144 divisors (see below), whose sum is σ = 1704483648. Its totient is φ = 119767040.

The previous prime is 525107197. The next prime is 525107221. The reversal of 525107220 is 22701525.

525107220 = 386² + 387² + ... + 1177².

It is a super-2 number, since 2×525107220² = 551475184992256800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525107221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189364 + ... + 192116.

It is an arithmetic number, because the mean of its divisors is an integer number (11836692).

Almost surely, 2^525107220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525107220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (852241824).

525107220 is an abundant number, since it is smaller than the sum of its proper divisors (1179376428).

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

525107220 is a wasteful number, since it uses less digits than its factorization.

525107220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810 (or 2791 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 525107220 is about 22915.2180875505. The cubic root of 525107220 is about 806.7692373120.

Adding to 525107220 its reverse (22701525), we get a palindrome (547808745).

The spelling of 525107220 in words is "five hundred twenty-five million, one hundred seven thousand, two hundred twenty".