155432005 has 16 divisors (see below), whose sum is σ = 192037104. Its totient is φ = 120683520.

The previous prime is 155431979. The next prime is 155432009. The reversal of 155432005 is 500234551.

It can be written as a sum of positive squares in 8 ways, for example, as 2439844 + 152992161 = 1562^2 + 12369^2 .

It is not a de Polignac number, because 155432005 - 2⁷ = 155431877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155432009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99309 + ... + 100861.

It is an arithmetic number, because the mean of its divisors is an integer number (12002319).

Almost surely, 2^155432005 is an apocalyptic number.

It is an amenable number.

155432005 is a deficient number, since it is larger than the sum of its proper divisors (36605099).

155432005 is a wasteful number, since it uses less digits than its factorization.

155432005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 155432005 is about 12467.2372641255. The cubic root of 155432005 is about 537.6671252432.

Adding to 155432005 its reverse (500234551), we get a palindrome (655666556).

The spelling of 155432005 in words is "one hundred fifty-five million, four hundred thirty-two thousand, five".