155321304 has 32 divisors (see below), whose sum is σ = 393776640. Its totient is φ = 51044000.

The previous prime is 155321293. The next prime is 155321317. The reversal of 155321304 is 403123551.

155321304 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43872 + ... + 47279.

It is an arithmetic number, because the mean of its divisors is an integer number (12305520).

Almost surely, 2^155321304 is an apocalyptic number.

It is an amenable number.

155321304 is an abundant number, since it is smaller than the sum of its proper divisors (238455336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155321304 is a wasteful number, since it uses less digits than its factorization.

155321304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91231 (or 91227 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 155321304 is about 12462.7967968671. The cubic root of 155321304 is about 537.5394500700.

Adding to 155321304 its reverse (403123551), we get a palindrome (558444855).

It can be divided in two parts, 15532 and 1304, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 155321304 in words is "one hundred fifty-five million, three hundred twenty-one thousand, three hundred four".