245515525 has 6 divisors (see below), whose sum is σ = 304439282. Its totient is φ = 196412400.

The previous prime is 245515507. The next prime is 245515531. The reversal of 245515525 is 525515542.

It can be written as a sum of positive squares in 3 ways, for example, as 10751841 + 234763684 = 3279^2 + 15322^2 .

It is not a de Polignac number, because 245515525 - 2¹³ = 245507333 is a prime.

It is a super-4 number, since 4×245515525⁴ (a number of 35 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 4910286 + ... + 4910335.

Almost surely, 2^245515525 is an apocalyptic number.

245515525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

245515525 is a deficient number, since it is larger than the sum of its proper divisors (58923757).

245515525 is an equidigital number, since it uses as much as digits as its factorization.

245515525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9820631 (or 9820626 counting only the distinct ones).

The product of its digits is 50000, while the sum is 34.

The square root of 245515525 is about 15668.9350308181. The cubic root of 245515525 is about 626.1710524475.

The spelling of 245515525 in words is "two hundred forty-five million, five hundred fifteen thousand, five hundred twenty-five".