527507681 has 4 divisors (see below), whose sum is σ = 540373764. Its totient is φ = 514641600.

The previous prime is 527507647. The next prime is 527507689. The reversal of 527507681 is 186705725.

527507681 = 16240² + 16241².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 263770081 + 263737600 = 16241^2 + 16240^2 .

It is a cyclic number.

It is not a de Polignac number, because 527507681 - 2²⁶ = 460398817 is a prime.

It is a super-2 number, since 2×527507681² = 556528707027995522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 12866041 = 527507681 / (5 + 2 + 7 + 5 + 0 + 7 + 6 + 8 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (527507689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6432980 + ... + 6433061.

It is an arithmetic number, because the mean of its divisors is an integer number (135093441).

Almost surely, 2^527507681 is an apocalyptic number.

527507681 is the 16241-st centered square number.

It is an amenable number.

527507681 is a deficient number, since it is larger than the sum of its proper divisors (12866083).

527507681 is a wasteful number, since it uses less digits than its factorization.

527507681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12866082.

The product of its (nonzero) digits is 117600, while the sum is 41.

The square root of 527507681 is about 22967.5353706052. The cubic root of 527507681 is about 807.9967165055.

The spelling of 527507681 in words is "five hundred twenty-seven million, five hundred seven thousand, six hundred eighty-one".