155331312 has 40 divisors (see below), whose sum is σ = 424879056. Its totient is φ = 48731136.

The previous prime is 155331311. The next prime is 155331331. The reversal of 155331312 is 213133551.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155331311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94363 + ... + 95994.

Almost surely, 2^155331312 is an apocalyptic number.

155331312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155331312 is an abundant number, since it is smaller than the sum of its proper divisors (269547744).

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

155331312 is a wasteful number, since it uses less digits than its factorization.

155331312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190385 (or 190379 counting only the distinct ones).

The product of its digits is 1350, while the sum is 24.

The square root of 155331312 is about 12463.1983054110. The cubic root of 155331312 is about 537.5509951256.

Adding to 155331312 its reverse (213133551), we get a palindrome (368464863).

The spelling of 155331312 in words is "one hundred fifty-five million, three hundred thirty-one thousand, three hundred twelve".