158552541221 has 4 divisors (see below), whose sum is σ = 158561568000. Its totient is φ = 158543514444.

The previous prime is 158552541211. The next prime is 158552541269. The reversal of 158552541221 is 122145255851.

158552541221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-158552541221 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 (158552541211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4486991 + ... + 4522188.

It is an arithmetic number, because the mean of its divisors is an integer number (39640392000).

Almost surely, 2^158552541221 is an apocalyptic number.

It is an amenable number.

158552541221 is a deficient number, since it is larger than the sum of its proper divisors (9026779).

158552541221 is an equidigital number, since it uses as much as digits as its factorization.

158552541221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9026778.

The product of its digits is 160000, while the sum is 41.

The spelling of 158552541221 in words is "one hundred fifty-eight billion, five hundred fifty-two million, five hundred forty-one thousand, two hundred twenty-one".