511020025 has 6 divisors (see below), whose sum is σ = 633664862. Its totient is φ = 408816000.

The previous prime is 511020019. The next prime is 511020031. The reversal of 511020025 is 520020115.

It is an interprime number because it is at equal distance from previous prime (511020019) and next prime (511020031).

It can be written as a sum of positive squares in 3 ways, for example, as 89415936 + 421604089 = 9456^2 + 20533^2 .

It is not a de Polignac number, because 511020025 - 2⁷ = 511019897 is a prime.

It is a super-2 number, since 2×511020025² = 522282931902001250, 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 = 511019990 and 511020008.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10220376 + ... + 10220425.

Almost surely, 2^511020025 is an apocalyptic number.

It is an amenable number.

511020025 is a deficient number, since it is larger than the sum of its proper divisors (122644837).

511020025 is a wasteful number, since it uses less digits than its factorization.

511020025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20440811 (or 20440806 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 511020025 is about 22605.7520334980. The cubic root of 511020025 is about 799.4892703676.

The spelling of 511020025 in words is "five hundred eleven million, twenty thousand, twenty-five".