155204013 has 4 divisors (see below), whose sum is σ = 206938688. Its totient is φ = 103469340.

The previous prime is 155204003. The next prime is 155204017. The reversal of 155204013 is 310402551.

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 not a de Polignac number, because 155204013 - 2¹⁰ = 155202989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155204017) 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, 25867333 + ... + 25867338.

It is an arithmetic number, because the mean of its divisors is an integer number (51734672).

Almost surely, 2^155204013 is an apocalyptic number.

It is an amenable number.

155204013 is a deficient number, since it is larger than the sum of its proper divisors (51734675).

155204013 is an equidigital number, since it uses as much as digits as its factorization.

155204013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51734674.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 155204013 is about 12458.0902629576. The cubic root of 155204013 is about 537.4041082226.

Adding to 155204013 its reverse (310402551), we get a palindrome (465606564).

The spelling of 155204013 in words is "one hundred fifty-five million, two hundred four thousand, thirteen".