525340532221 has 4 divisors (see below), whose sum is σ = 525356773344. Its totient is φ = 525324291100.

The previous prime is 525340532209. The next prime is 525340532257. The reversal of 525340532221 is 122235043525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525340532221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525340532621) 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, 8071945 + ... + 8136766.

It is an arithmetic number, because the mean of its divisors is an integer number (131339193336).

Almost surely, 2^525340532221 is an apocalyptic number.

It is an amenable number.

525340532221 is a deficient number, since it is larger than the sum of its proper divisors (16241123).

525340532221 is a wasteful number, since it uses less digits than its factorization.

525340532221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16241122.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 525340532221 its reverse (122235043525), we get a palindrome (647575575746).

The spelling of 525340532221 in words is "five hundred twenty-five billion, three hundred forty million, five hundred thirty-two thousand, two hundred twenty-one".