155530001 has 8 divisors (see below), whose sum is σ = 171350208. Its totient is φ = 139990000.

The previous prime is 155529977. The next prime is 155530031. The reversal of 155530001 is 100035551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155530001 - 2⁶ = 155529937 is a prime.

It is a super-2 number, since 2×155530001² = 48379162422120002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155530031) 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, 68885 + ... + 71106.

It is an arithmetic number, because the mean of its divisors is an integer number (21418776).

Almost surely, 2^155530001 is an apocalyptic number.

155530001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155530001 is a deficient number, since it is larger than the sum of its proper divisors (15820207).

155530001 is a wasteful number, since it uses less digits than its factorization.

155530001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140103.

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 155530001 is about 12471.1667858304. The cubic root of 155530001 is about 537.7800967392.

Adding to 155530001 its reverse (100035551), we get a palindrome (255565552).

The spelling of 155530001 in words is "one hundred fifty-five million, five hundred thirty thousand, one".