159551005 has 4 divisors (see below), whose sum is σ = 191461212. Its totient is φ = 127640800.

The previous prime is 159550991. The next prime is 159551009. The reversal of 159551005 is 500155951.

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 25130169 + 134420836 = 5013^2 + 11594^2 .

It is not a de Polignac number, because 159551005 - 2⁵ = 159550973 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 (159551009) 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, 15955096 + ... + 15955105.

It is an arithmetic number, because the mean of its divisors is an integer number (47865303).

Almost surely, 2^159551005 is an apocalyptic number.

It is an amenable number.

159551005 is a deficient number, since it is larger than the sum of its proper divisors (31910207).

159551005 is an equidigital number, since it uses as much as digits as its factorization.

159551005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31910206.

The product of its (nonzero) digits is 5625, while the sum is 31.

The square root of 159551005 is about 12631.3500861943. The cubic root of 159551005 is about 542.3752309214.

The spelling of 159551005 in words is "one hundred fifty-nine million, five hundred fifty-one thousand, five".