527471981 has 4 divisors (see below), whose sum is σ = 545660700. Its totient is φ = 509283264.

The previous prime is 527471951. The next prime is 527472017. The reversal of 527471981 is 189174725.

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 405015625 + 122456356 = 20125^2 + 11066^2 .

It is a cyclic number.

It is not a de Polignac number, because 527471981 - 2¹⁴ = 527455597 is a prime.

It is a super-2 number, since 2×527471981² = 556453381480128722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (527471921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9094316 + ... + 9094373.

It is an arithmetic number, because the mean of its divisors is an integer number (136415175).

Almost surely, 2^527471981 is an apocalyptic number.

It is an amenable number.

527471981 is a deficient number, since it is larger than the sum of its proper divisors (18188719).

527471981 is a wasteful number, since it uses less digits than its factorization.

527471981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18188718.

The product of its digits is 141120, while the sum is 44.

The square root of 527471981 is about 22966.7581734994. The cubic root of 527471981 is about 807.9784885664.

The spelling of 527471981 in words is "five hundred twenty-seven million, four hundred seventy-one thousand, nine hundred eighty-one".