525011681 has 2 divisors, whose sum is σ = 525011682. Its totient is φ = 525011680.

The previous prime is 525011671. The next prime is 525011719. The reversal of 525011681 is 186110525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502163281 + 22848400 = 22409^2 + 4780^2 .

It is a cyclic number.

It is not a de Polignac number, because 525011681 - 2²² = 520817377 is a prime.

It is a super-2 number, since 2×525011681² = 551274530372891522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (525011651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262505840 + 262505841.

It is an arithmetic number, because the mean of its divisors is an integer number (262505841).

Almost surely, 2^525011681 is an apocalyptic number.

It is an amenable number.

525011681 is a deficient number, since it is larger than the sum of its proper divisors (1).

525011681 is an equidigital number, since it uses as much as digits as its factorization.

525011681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 29.

The square root of 525011681 is about 22913.1333736789. The cubic root of 525011681 is about 806.7203059711.

The spelling of 525011681 in words is "five hundred twenty-five million, eleven thousand, six hundred eighty-one".