511402025 has 6 divisors (see below), whose sum is σ = 634138542. Its totient is φ = 409121600.

The previous prime is 511402019. The next prime is 511402039. The reversal of 511402025 is 520204115.

It can be written as a sum of positive squares in 3 ways, for example, as 88811776 + 422590249 = 9424^2 + 20557^2 .

It is a de Polignac number, because none of the positive numbers 2^k-511402025 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 511401988 and 511402006.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10228016 + ... + 10228065.

It is an arithmetic number, because the mean of its divisors is an integer number (105689757).

Almost surely, 2^511402025 is an apocalyptic number.

It is an amenable number.

511402025 is a deficient number, since it is larger than the sum of its proper divisors (122736517).

511402025 is a wasteful number, since it uses less digits than its factorization.

511402025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20456091 (or 20456086 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 511402025 is about 22614.1996320896. The cubic root of 511402025 is about 799.6884333610.

The spelling of 511402025 in words is "five hundred eleven million, four hundred two thousand, twenty-five".