1550555159 has 4 divisors (see below), whose sum is σ = 1641764304. Its totient is φ = 1459346016.

The previous prime is 1550555141. The next prime is 1550555197. The reversal of 1550555159 is 9515550551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9515550551 = 13 ⋅731965427.

It is a cyclic number.

It is not a de Polignac number, because 1550555159 - 2¹² = 1550551063 is a prime.

It is a super-2 number, since 2×1550555159² = 4808442602203030562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550555659) 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, 45604547 + ... + 45604580.

It is an arithmetic number, because the mean of its divisors is an integer number (410441076).

Almost surely, 2^1550555159 is an apocalyptic number.

1550555159 is a deficient number, since it is larger than the sum of its proper divisors (91209145).

1550555159 is an equidigital number, since it uses as much as digits as its factorization.

1550555159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91209144.

The product of its (nonzero) digits is 140625, while the sum is 41.

The square root of 1550555159 is about 39377.0892652060. The cubic root of 1550555159 is about 1157.4326790441.

The spelling of 1550555159 in words is "one billion, five hundred fifty million, five hundred fifty-five thousand, one hundred fifty-nine".