521511052054053 has 4 divisors (see below), whose sum is σ = 695348069405408. Its totient is φ = 347674034702700.

The previous prime is 521511052054049. The next prime is 521511052054121. The reversal of 521511052054053 is 350450250115125.

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 not a de Polignac number, because 521511052054053 - 2² = 521511052054049 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 (521511052074053) 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, 86918508675673 + ... + 86918508675678.

It is an arithmetic number, because the mean of its divisors is an integer number (173837017351352).

Almost surely, 2^{521511052054053} is an apocalyptic number.

It is an amenable number.

521511052054053 is a deficient number, since it is larger than the sum of its proper divisors (173837017351355).

521511052054053 is a wasteful number, since it uses less digits than its factorization.

521511052054053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173837017351354.

The product of its (nonzero) digits is 150000, while the sum is 39.

The spelling of 521511052054053 in words is "five hundred twenty-one trillion, five hundred eleven billion, fifty-two million, fifty-four thousand, fifty-three".