155144320 has 32 divisors (see below), whose sum is σ = 370893420. Its totient is φ = 62057472.

The previous prime is 155144273. The next prime is 155144323. The reversal of 155144320 is 23441551.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 154355776 + 788544 = 12424^2 + 888^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (155144323) 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 3 ways as a sum of consecutive naturals, for example, 120567 + ... + 121846.

Almost surely, 2^155144320 is an apocalyptic number.

155144320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155144320 is an abundant number, since it is smaller than the sum of its proper divisors (215749100).

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

155144320 is an equidigital number, since it uses as much as digits as its factorization.

155144320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242432 (or 242420 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 155144320 is about 12455.6942801275. The cubic root of 155144320 is about 537.3352024077.

Adding to 155144320 its reverse (23441551), we get a palindrome (178585871).

The spelling of 155144320 in words is "one hundred fifty-five million, one hundred forty-four thousand, three hundred twenty".