520653054021 has 4 divisors (see below), whose sum is σ = 694204072032. Its totient is φ = 347102036012.

The previous prime is 520653053989. The next prime is 520653054049. The reversal of 520653054021 is 120450356025.

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 not a de Polignac number, because 520653054021 - 2⁵ = 520653053989 is a prime.

It is a super-2 number, since 2×520653054021² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520653054091) 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, 86775509001 + ... + 86775509006.

It is an arithmetic number, because the mean of its divisors is an integer number (173551018008).

Almost surely, 2^520653054021 is an apocalyptic number.

It is an amenable number.

520653054021 is a deficient number, since it is larger than the sum of its proper divisors (173551018011).

520653054021 is a wasteful number, since it uses less digits than its factorization.

520653054021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173551018010.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 520653054021 in words is "five hundred twenty billion, six hundred fifty-three million, fifty-four thousand, twenty-one".