155564245 has 4 divisors (see below), whose sum is σ = 186677100. Its totient is φ = 124451392.

The previous prime is 155564183. The next prime is 155564261. The reversal of 155564245 is 542465551.

155564245 is digitally balanced in base 2, 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 can be written as a sum of positive squares in 2 ways, for example, as 70795396 + 84768849 = 8414^2 + 9207^2 .

It is a cyclic number.

It is not a de Polignac number, because 155564245 - 2⁷ = 155564117 is a prime.

It is a congruent 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, 15556420 + ... + 15556429.

It is an arithmetic number, because the mean of its divisors is an integer number (46669275).

Almost surely, 2^155564245 is an apocalyptic number.

It is an amenable number.

155564245 is a deficient number, since it is larger than the sum of its proper divisors (31112855).

155564245 is an equidigital number, since it uses as much as digits as its factorization.

155564245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31112854.

The product of its digits is 120000, while the sum is 37.

The square root of 155564245 is about 12472.5396371389. The cubic root of 155564245 is about 537.8195626302.

The spelling of 155564245 in words is "one hundred fifty-five million, five hundred sixty-four thousand, two hundred forty-five".