155232320 has 28 divisors (see below), whose sum is σ = 369647724. Its totient is φ = 62092800.

The previous prime is 155232293. The next prime is 155232347. The reversal of 155232320 is 23232551.

It is an interprime number because it is at equal distance from previous prime (155232293) and next prime (155232347).

It can be written as a sum of positive squares in 2 ways, for example, as 99042304 + 56190016 = 9952^2 + 7496^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242231 + ... + 242870.

Almost surely, 2^155232320 is an apocalyptic number.

155232320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155232320 is an abundant number, since it is smaller than the sum of its proper divisors (214415404).

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

155232320 is an equidigital number, since it uses as much as digits as its factorization.

155232320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485118 (or 485108 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 155232320 is about 12459.2263002162. The cubic root of 155232320 is about 537.4367778533.

Adding to 155232320 its reverse (23232551), we get a palindrome (178464871).

The spelling of 155232320 in words is "one hundred fifty-five million, two hundred thirty-two thousand, three hundred twenty".