155000011 has 4 divisors (see below), whose sum is σ = 157313512. Its totient is φ = 152686512.

The previous prime is 154999981. The next prime is 155000023. The reversal of 155000011 is 110000551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155000011 - 2⁷ = 154999883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154999955 and 155000000.

It is not an unprimeable number, because it can be changed into a prime (155000411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1156650 + ... + 1156783.

It is an arithmetic number, because the mean of its divisors is an integer number (39328378).

Almost surely, 2^155000011 is an apocalyptic number.

155000011 is a deficient number, since it is larger than the sum of its proper divisors (2313501).

155000011 is an equidigital number, since it uses as much as digits as its factorization.

155000011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313500.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 155000011 is about 12449.9000397594. The cubic root of 155000011 is about 537.1685482017.

Adding to 155000011 its reverse (110000551), we get a palindrome (265000562).

The spelling of 155000011 in words is "one hundred fifty-five million, eleven", and thus it is an aban number.