155243320 has 32 divisors (see below), whose sum is σ = 369846000. Its totient is φ = 58444288.

The previous prime is 155243317. The next prime is 155243321. The reversal of 155243320 is 23342551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155243321) 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, 113470 + ... + 114829.

Almost surely, 2^155243320 is an apocalyptic number.

155243320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155243320 is an abundant number, since it is smaller than the sum of its proper divisors (214602680).

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

155243320 is a wasteful number, since it uses less digits than its factorization.

155243320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228327 (or 228323 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 155243320 is about 12459.6677323274. The cubic root of 155243320 is about 537.4494720846.

Adding to 155243320 its reverse (23342551), we get a palindrome (178585871).

The spelling of 155243320 in words is "one hundred fifty-five million, two hundred forty-three thousand, three hundred twenty".