155103409 has 4 divisors (see below), whose sum is σ = 155196400. Its totient is φ = 155010420.

The previous prime is 155103407. The next prime is 155103439. The reversal of 155103409 is 904301551.

155103409 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155103409 - 2¹ = 155103407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155103407) 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, 43947 + ... + 47344.

It is an arithmetic number, because the mean of its divisors is an integer number (38799100).

Almost surely, 2^155103409 is an apocalyptic number.

It is an amenable number.

155103409 is a deficient number, since it is larger than the sum of its proper divisors (92991).

155103409 is an equidigital number, since it uses as much as digits as its factorization.

155103409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92990.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 155103409 is about 12454.0519109244. The cubic root of 155103409 is about 537.2879671345.

The spelling of 155103409 in words is "one hundred fifty-five million, one hundred three thousand, four hundred nine".