11381955 has 16 divisors (see below), whose sum is σ = 19612320. Its totient is φ = 5603328.

The previous prime is 11381921. The next prime is 11381963. The reversal of 11381955 is 55918311.

It is not a de Polignac number, because 11381955 - 2⁷ = 11381827 is a prime.

It is an unprimeable number.

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, 28990 + ... + 29379.

It is an arithmetic number, because the mean of its divisors is an integer number (1225770).

Almost surely, 2^11381955 is an apocalyptic number.

11381955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11381955 is a deficient number, since it is larger than the sum of its proper divisors (8230365).

11381955 is a wasteful number, since it uses less digits than its factorization.

11381955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58390.

The product of its digits is 5400, while the sum is 33.

The square root of 11381955 is about 3373.7153110480. The cubic root of 11381955 is about 224.9428990903.

The spelling of 11381955 in words is "eleven million, three hundred eighty-one thousand, nine hundred fifty-five".