525040410554021 has 4 divisors (see below), whose sum is σ = 525040479438732. Its totient is φ = 525040341669312.

The previous prime is 525040410554017. The next prime is 525040410554039. The reversal of 525040410554021 is 120455014040525.

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 180617848663396 + 344422561890625 = 13439414^2 + 18558625^2 .

It is a cyclic number.

It is not a de Polignac number, because 525040410554021 - 2² = 525040410554017 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 (525040415554021) 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, 21350570 + ... + 38806283.

It is an arithmetic number, because the mean of its divisors is an integer number (131260119859683).

Almost surely, 2^{525040410554021} is an apocalyptic number.

It is an amenable number.

525040410554021 is a deficient number, since it is larger than the sum of its proper divisors (68884711).

525040410554021 is an equidigital number, since it uses as much as digits as its factorization.

525040410554021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68884710.

The product of its (nonzero) digits is 160000, while the sum is 38.

Adding to 525040410554021 its reverse (120455014040525), we get a palindrome (645495424594546).

The spelling of 525040410554021 in words is "five hundred twenty-five trillion, forty billion, four hundred ten million, five hundred fifty-four thousand, twenty-one".