52145050021 has 4 divisors (see below), whose sum is σ = 52159158412. Its totient is φ = 52130941632.

The previous prime is 52145049991. The next prime is 52145050037. The reversal of 52145050021 is 12005054125.

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 14930396100 + 37214653921 = 122190^2 + 192911^2 .

It is a cyclic number.

It is not a de Polignac number, because 52145050021 - 2¹¹ = 52145047973 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 (52145050621) 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, 7048650 + ... + 7056043.

It is an arithmetic number, because the mean of its divisors is an integer number (13039789603).

Almost surely, 2^52145050021 is an apocalyptic number.

It is an amenable number.

52145050021 is a deficient number, since it is larger than the sum of its proper divisors (14108391).

52145050021 is a wasteful number, since it uses less digits than its factorization.

52145050021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14108390.

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 52145050021 in words is "fifty-two billion, one hundred forty-five million, fifty thousand, twenty-one".