155231328 has 48 divisors (see below), whose sum is σ = 465696000. Its totient is φ = 44351616.

The previous prime is 155231327. The next prime is 155231407. The reversal of 155231328 is 823132551.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 155231295 and 155231304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155231327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114828 + ... + 116171.

It is an arithmetic number, because the mean of its divisors is an integer number (9702000).

Almost surely, 2^155231328 is an apocalyptic number.

It is an amenable number.

155231328 is an abundant number, since it is smaller than the sum of its proper divisors (310464672).

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

155231328 is a wasteful number, since it uses less digits than its factorization.

155231328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231019 (or 231011 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 155231328 is about 12459.1864902970. The cubic root of 155231328 is about 537.4356330349.

Adding to 155231328 its reverse (823132551), we get a palindrome (978363879).

The spelling of 155231328 in words is "one hundred fifty-five million, two hundred thirty-one thousand, three hundred twenty-eight".