52154643221 has 4 divisors (see below), whose sum is σ = 52199182944. Its totient is φ = 52110103500.

The previous prime is 52154643143. The next prime is 52154643227. The reversal of 52154643221 is 12234645125.

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 52154643221 - 2¹⁴ = 52154626837 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 (52154643227) 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, 22268105 + ... + 22270446.

It is an arithmetic number, because the mean of its divisors is an integer number (13049795736).

Almost surely, 2^52154643221 is an apocalyptic number.

It is an amenable number.

52154643221 is a deficient number, since it is larger than the sum of its proper divisors (44539723).

52154643221 is a wasteful number, since it uses less digits than its factorization.

52154643221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44539722.

The product of its digits is 57600, while the sum is 35.

The spelling of 52154643221 in words is "fifty-two billion, one hundred fifty-four million, six hundred forty-three thousand, two hundred twenty-one".