155052305 has 4 divisors (see below), whose sum is σ = 186062772. Its totient is φ = 124041840.

The previous prime is 155052263. The next prime is 155052341. The reversal of 155052305 is 503250551.

155052305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 12452²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503250551 = 3931 ⋅128021.

It can be written as a sum of positive squares in 2 ways, for example, as 55830784 + 99221521 = 7472^2 + 9961^2 .

It is not a de Polignac number, because 155052305 - 2¹² = 155048209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15505226 + ... + 15505235.

It is an arithmetic number, because the mean of its divisors is an integer number (46515693).

Almost surely, 2^155052305 is an apocalyptic number.

It is an amenable number.

155052305 is a deficient number, since it is larger than the sum of its proper divisors (31010467).

155052305 is an equidigital number, since it uses as much as digits as its factorization.

155052305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31010466.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 155052305 is about 12452.0000401542. Note that the first 4 decimals coincide. The cubic root of 155052305 is about 537.2289514954.

The spelling of 155052305 in words is "one hundred fifty-five million, fifty-two thousand, three hundred five".