155641005 has 24 divisors (see below), whose sum is σ = 290530968. Its totient is φ = 76622976.

The previous prime is 155640973. The next prime is 155641009. The reversal of 155641005 is 500146551.

It is a happy number.

155641005 is a `hidden beast` number, since 1 + 556 + 4 + 100 + 5 = 666.

155641005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9400356 + 146240649 = 3066^2 + 12093^2 .

It is not a de Polignac number, because 155641005 - 2⁵ = 155640973 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 155641005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155641009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132442 + ... + 133611.

It is an arithmetic number, because the mean of its divisors is an integer number (12105457).

Almost surely, 2^155641005 is an apocalyptic number.

155641005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155641005 is a deficient number, since it is larger than the sum of its proper divisors (134889963).

155641005 is a wasteful number, since it uses less digits than its factorization.

155641005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266077 (or 266074 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 155641005 is about 12475.6164176364. The cubic root of 155641005 is about 537.9080067784.

Adding to 155641005 its reverse (500146551), we get a palindrome (655787556).

The spelling of 155641005 in words is "one hundred fifty-five million, six hundred forty-one thousand, five".