155000001 has 8 divisors (see below), whose sum is σ = 222564160. Its totient is φ = 95384592.

The previous prime is 154999981. The next prime is 155000023. The reversal of 155000001 is 100000551.

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

It is not a de Polignac number, because 155000001 - 2¹⁸ = 154737857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155000201) 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 7 ways as a sum of consecutive naturals, for example, 1987141 + ... + 1987218.

It is an arithmetic number, because the mean of its divisors is an integer number (27820520).

Almost surely, 2^155000001 is an apocalyptic number.

It is an amenable number.

155000001 is a deficient number, since it is larger than the sum of its proper divisors (67564159).

155000001 is a wasteful number, since it uses less digits than its factorization.

155000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974375.

The product of its (nonzero) digits is 25, while the sum is 12.

The square root of 155000001 is about 12449.8996381497. The cubic root of 155000001 is about 537.1685366497.

Adding to 155000001 its reverse (100000551), we get a palindrome (255000552).

The spelling of 155000001 in words is "one hundred fifty-five million, one", and thus it is an aban number.