1111000155 has 16 divisors (see below), whose sum is σ = 1778674464. Its totient is φ = 592175360.

The previous prime is 1111000139. The next prime is 1111000157. The reversal of 1111000155 is 5510001111.

It is not a de Polignac number, because 1111000155 - 2⁴ = 1111000139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1111000157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4297 + ... + 47333.

It is an arithmetic number, because the mean of its divisors is an integer number (111167154).

Almost surely, 2^1111000155 is an apocalyptic number.

1111000155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1111000155 is a deficient number, since it is larger than the sum of its proper divisors (667674309).

1111000155 is a wasteful number, since it uses less digits than its factorization.

1111000155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44766.

The product of its (nonzero) digits is 25, while the sum is 15.

The square root of 1111000155 is about 33331.6689501141. The cubic root of 1111000155 is about 1035.7096908601.

Adding to 1111000155 its reverse (5510001111), we get a palindrome (6621001266).

The spelling of 1111000155 in words is "one billion, one hundred eleven million, one hundred fifty-five", and thus it is an aban number.