155320000 has 140 divisors (see below), whose sum is σ = 421346376. Its totient is φ = 56320000.

The previous prime is 155319991. The next prime is 155320001. The reversal of 155320000 is 23551.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (155320001) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 439824 + ... + 440176.

Almost surely, 2^155320000 is an apocalyptic number.

155320000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210673188).

155320000 is an abundant number, since it is smaller than the sum of its proper divisors (266026376).

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

155320000 is an equidigital number, since it uses as much as digits as its factorization.

155320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 155320000 is about 12462.7444810523. The cubic root of 155320000 is about 537.5379457617.

Adding to 155320000 its reverse (23551), we get a palindrome (155343551).

The spelling of 155320000 in words is "one hundred fifty-five million, three hundred twenty thousand".