1550115155 has 4 divisors (see below), whose sum is σ = 1860138192. Its totient is φ = 1240092120.

The previous prime is 1550115139. The next prime is 1550115157. The reversal of 1550115155 is 5515110551.

It is a happy number.

1550115155 is digitally balanced in base 6, 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.

It is not a de Polignac number, because 1550115155 - 2⁴ = 1550115139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1550115157) 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, 155011511 + ... + 155011520.

It is an arithmetic number, because the mean of its divisors is an integer number (465034548).

Almost surely, 2^1550115155 is an apocalyptic number.

1550115155 is a deficient number, since it is larger than the sum of its proper divisors (310023037).

1550115155 is an equidigital number, since it uses as much as digits as its factorization.

1550115155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310023036.

The product of its (nonzero) digits is 3125, while the sum is 29.

The square root of 1550115155 is about 39371.5018128595. The cubic root of 1550115155 is about 1157.3231863922.

The spelling of 1550115155 in words is "one billion, five hundred fifty million, one hundred fifteen thousand, one hundred fifty-five".