155552011 has 2 divisors, whose sum is σ = 155552012. Its totient is φ = 155552010.

The previous prime is 155551997. The next prime is 155552021. The reversal of 155552011 is 110255551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155552011 - 2⁷ = 155551883 is a prime.

It is a super-2 number, since 2×155552011² = 48392856252288242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155552021) 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 as a sum of consecutive naturals, namely, 77776005 + 77776006.

It is an arithmetic number, because the mean of its divisors is an integer number (77776006).

Almost surely, 2^155552011 is an apocalyptic number.

155552011 is a deficient number, since it is larger than the sum of its proper divisors (1).

155552011 is an equidigital number, since it uses as much as digits as its factorization.

155552011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1250, while the sum is 25.

The square root of 155552011 is about 12472.0491900890. The cubic root of 155552011 is about 537.8054637242.

The spelling of 155552011 in words is "one hundred fifty-five million, five hundred fifty-two thousand, eleven".