1214911155 has 16 divisors (see below), whose sum is σ = 1944705024. Its totient is φ = 647670240.

The previous prime is 1214911151. The next prime is 1214911189. The reversal of 1214911155 is 5511194121.

It is not a de Polignac number, because 1214911155 - 2² = 1214911151 is a prime.

It is a super-2 number, since 2×1214911155² = 2952018229086868050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1214911151) 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 15 ways as a sum of consecutive naturals, for example, 20590 + ... + 53420.

It is an arithmetic number, because the mean of its divisors is an integer number (121544064).

Almost surely, 2^1214911155 is an apocalyptic number.

1214911155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1214911155 is a deficient number, since it is larger than the sum of its proper divisors (729793869).

1214911155 is a wasteful number, since it uses less digits than its factorization.

1214911155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35306.

The product of its digits is 1800, while the sum is 30.

The square root of 1214911155 is about 34855.5756658816. The cubic root of 1214911155 is about 1067.0419814796.

The spelling of 1214911155 in words is "one billion, two hundred fourteen million, nine hundred eleven thousand, one hundred fifty-five".