201520525 has 6 divisors (see below), whose sum is σ = 249885482. Its totient is φ = 161216400.

The previous prime is 201520493. The next prime is 201520531. The reversal of 201520525 is 525025102.

It can be written as a sum of positive squares in 3 ways, for example, as 70509609 + 131010916 = 8397^2 + 11446^2 .

It is not a de Polignac number, because 201520525 - 2⁵ = 201520493 is a prime.

It is a super-2 number, since 2×201520525² = 81221043992551250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201520496 and 201520505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4030386 + ... + 4030435.

Almost surely, 2^201520525 is an apocalyptic number.

201520525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

201520525 is a deficient number, since it is larger than the sum of its proper divisors (48364957).

201520525 is an equidigital number, since it uses as much as digits as its factorization.

201520525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8060831 (or 8060826 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 201520525 is about 14195.7925104589. The cubic root of 201520525 is about 586.2818217171.

Adding to 201520525 its reverse (525025102), we get a palindrome (726545627).

The spelling of 201520525 in words is "two hundred one million, five hundred twenty thousand, five hundred twenty-five".