527665554221 has 24 divisors (see below), whose sum is σ = 588731905440. Its totient is φ = 470115848160.

The previous prime is 527665554211. The next prime is 527665554239. The reversal of 527665554221 is 122455566725.

It is not a de Polignac number, because 527665554221 - 2¹⁴ = 527665537837 is a prime.

It is a super-2 number, since 2×527665554221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 527665554221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (527665554211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4679126 + ... + 4790568.

It is an arithmetic number, because the mean of its divisors is an integer number (24530496060).

Almost surely, 2^527665554221 is an apocalyptic number.

It is an amenable number.

527665554221 is a deficient number, since it is larger than the sum of its proper divisors (61066351219).

527665554221 is a wasteful number, since it uses less digits than its factorization.

527665554221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111897 (or 111866 counting only the distinct ones).

The product of its digits is 5040000, while the sum is 50.

The spelling of 527665554221 in words is "five hundred twenty-seven billion, six hundred sixty-five million, five hundred fifty-four thousand, two hundred twenty-one".