155311404 has 12 divisors (see below), whose sum is σ = 362393304. Its totient is φ = 51770464.

The previous prime is 155311397. The next prime is 155311411. The reversal of 155311404 is 404113551.

It is a happy number.

155311404 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (155311397) and next prime (155311411).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6471297 + ... + 6471320.

It is an arithmetic number, because the mean of its divisors is an integer number (30199442).

Almost surely, 2^155311404 is an apocalyptic number.

It is an amenable number.

155311404 is an abundant number, since it is smaller than the sum of its proper divisors (207081900).

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

155311404 is a wasteful number, since it uses less digits than its factorization.

155311404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12942624 (or 12942622 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 155311404 is about 12462.3996084221. The cubic root of 155311404 is about 537.5280291134.

Adding to 155311404 its reverse (404113551), we get a palindrome (559424955).

The spelling of 155311404 in words is "one hundred fifty-five million, three hundred eleven thousand, four hundred four".