155432530 has 64 divisors (see below), whose sum is σ = 330853248. Its totient is φ = 51932160.

The previous prime is 155432467. The next prime is 155432531. The reversal of 155432530 is 35234551.

155432530 = 45² + 46² + ... + 775².

It is not an unprimeable number, because it can be changed into a prime (155432531) 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 31 ways as a sum of consecutive naturals, for example, 79444 + ... + 81376.

It is an arithmetic number, because the mean of its divisors is an integer number (5169582).

Almost surely, 2^155432530 is an apocalyptic number.

155432530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155432530 is an abundant number, since it is smaller than the sum of its proper divisors (175420718).

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

155432530 is a wasteful number, since it uses less digits than its factorization.

155432530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 155432530 is about 12467.2583192938. The cubic root of 155432530 is about 537.6677305988.

The spelling of 155432530 in words is "one hundred fifty-five million, four hundred thirty-two thousand, five hundred thirty".