53220452521 has 8 divisors (see below), whose sum is σ = 54942499584. Its totient is φ = 51498734160.

The previous prime is 53220452477. The next prime is 53220452573. The reversal of 53220452521 is 12525402235.

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 53220452521 - 2⁷ = 53220452393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53220452581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271050 + ... + 424156.

It is an arithmetic number, because the mean of its divisors is an integer number (6867812448).

Almost surely, 2^53220452521 is an apocalyptic number.

It is an amenable number.

53220452521 is a deficient number, since it is larger than the sum of its proper divisors (1722047063).

53220452521 is a wasteful number, since it uses less digits than its factorization.

53220452521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164351.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 53220452521 its reverse (12525402235), we get a palindrome (65745854756).

The spelling of 53220452521 in words is "fifty-three billion, two hundred twenty million, four hundred fifty-two thousand, five hundred twenty-one".