155513320 has 32 divisors (see below), whose sum is σ = 350853120. Its totient is φ = 62036800.

The previous prime is 155513299. The next prime is 155513357. The reversal of 155513320 is 23315551.

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 7 ways as a sum of consecutive naturals, for example, 10245 + ... + 20395.

It is an arithmetic number, because the mean of its divisors is an integer number (10964160).

Almost surely, 2^155513320 is an apocalyptic number.

155513320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155513320 is an abundant number, since it is smaller than the sum of its proper divisors (195339800).

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

155513320 is a wasteful number, since it uses less digits than its factorization.

155513320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10545 (or 10541 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 155513320 is about 12470.4979852450. The cubic root of 155513320 is about 537.7608699438.

Adding to 155513320 its reverse (23315551), we get a palindrome (178828871).

The spelling of 155513320 in words is "one hundred fifty-five million, five hundred thirteen thousand, three hundred twenty".