52121520521551 has 8 divisors (see below), whose sum is σ = 57051046422944. Its totient is φ = 47323448644320.

The previous prime is 52121520521549. The next prime is 52121520521561. The reversal of 52121520521551 is 15512502512125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52121520521551 - 2¹ = 52121520521549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52121520521551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52121520521531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32863505211 + ... + 32863506796.

It is an arithmetic number, because the mean of its divisors is an integer number (7131380802868).

Almost surely, 2^{52121520521551} is an apocalyptic number.

52121520521551 is a deficient number, since it is larger than the sum of its proper divisors (4929525901393).

52121520521551 is a wasteful number, since it uses less digits than its factorization.

52121520521551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65727012081.

The product of its (nonzero) digits is 50000, while the sum is 37.

The spelling of 52121520521551 in words is "fifty-two trillion, one hundred twenty-one billion, five hundred twenty million, five hundred twenty-one thousand, five hundred fifty-one".