158320553 has 4 divisors (see below), whose sum is σ = 158360148. Its totient is φ = 158280960.

The previous prime is 158320549. The next prime is 158320573. The reversal of 158320553 is 355023851.

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 51652969 + 106667584 = 7187^2 + 10328^2 .

It is a cyclic number.

It is not a de Polignac number, because 158320553 - 2² = 158320549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (158320573) 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 3 ways as a sum of consecutive naturals, for example, 13028 + ... + 22053.

It is an arithmetic number, because the mean of its divisors is an integer number (39590037).

Almost surely, 2^158320553 is an apocalyptic number.

It is an amenable number.

158320553 is a deficient number, since it is larger than the sum of its proper divisors (39595).

158320553 is an equidigital number, since it uses as much as digits as its factorization.

158320553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39594.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 158320553 is about 12582.5495429186. The cubic root of 158320553 is about 540.9773714601.

The spelling of 158320553 in words is "one hundred fifty-eight million, three hundred twenty thousand, five hundred fifty-three".