1911213132 has 12 divisors (see below), whose sum is σ = 4459497336. Its totient is φ = 637071040.

The previous prime is 1911213121. The next prime is 1911213163. The reversal of 1911213132 is 2313121191.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79633869 + ... + 79633892.

It is an arithmetic number, because the mean of its divisors is an integer number (371624778).

Almost surely, 2^1911213132 is an apocalyptic number.

1911213132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1911213132 is an abundant number, since it is smaller than the sum of its proper divisors (2548284204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1911213132 is a wasteful number, since it uses less digits than its factorization.

1911213132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159267768 (or 159267766 counting only the distinct ones).

The product of its digits is 324, while the sum is 24.

The square root of 1911213132 is about 43717.4236660854. The cubic root of 1911213132 is about 1240.9940719285.

The spelling of 1911213132 in words is "one billion, nine hundred eleven million, two hundred thirteen thousand, one hundred thirty-two".