515442025 has 18 divisors (see below), whose sum is σ = 743500590. Its totient is φ = 353445120.

The previous prime is 515442019. The next prime is 515442061. The reversal of 515442025 is 520244515.

It can be written as a sum of positive squares in 3 ways, for example, as 46676224 + 468765801 = 6832^2 + 21651^2 .

It is not a de Polignac number, because 515442025 - 2³ = 515442017 is a prime.

It is a super-2 number, since 2×515442025² = 531360962272201250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 515441984 and 515442002.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 209160 + ... + 211609.

Almost surely, 2^515442025 is an apocalyptic number.

It is an amenable number.

515442025 is a deficient number, since it is larger than the sum of its proper divisors (228058565).

515442025 is a wasteful number, since it uses less digits than its factorization.

515442025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420793 (or 420781 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 515442025 is about 22703.3483213380. The cubic root of 515442025 is about 801.7887189789.

The spelling of 515442025 in words is "five hundred fifteen million, four hundred forty-two thousand, twenty-five".