155231304 has 16 divisors (see below), whose sum is σ = 388078320. Its totient is φ = 51743760.

The previous prime is 155231281. The next prime is 155231309. The reversal of 155231304 is 403132551.

155231304 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), and also a Moran number because the ratio is a prime number: 6467971 = 155231304 / (1 + 5 + 5 + 2 + 3 + 1 + 3 + 0 + 4).

It is not an unprimeable number, because it can be changed into a prime (155231309) 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, 3233962 + ... + 3234009.

It is an arithmetic number, because the mean of its divisors is an integer number (24254895).

Almost surely, 2^155231304 is an apocalyptic number.

It is an amenable number.

155231304 is an abundant number, since it is smaller than the sum of its proper divisors (232847016).

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

155231304 is a wasteful number, since it uses less digits than its factorization.

155231304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6467980 (or 6467976 counting only the distinct ones).

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

The square root of 155231304 is about 12459.1855271522. The cubic root of 155231304 is about 537.4356053377.

Adding to 155231304 its reverse (403132551), we get a palindrome (558363855).

The spelling of 155231304 in words is "one hundred fifty-five million, two hundred thirty-one thousand, three hundred four".