11551995 has 108 divisors (see below), whose sum is σ = 26035776. Its totient is φ = 4717440.

The previous prime is 11551979. The next prime is 11551999. The reversal of 11551995 is 59915511.

11551995 is a `hidden beast` number, since 11 + 551 + 9 + 95 = 666.

11551995 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11551995 - 2⁴ = 11551979 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (11551999) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 372630 + ... + 372660.

It is an arithmetic number, because the mean of its divisors is an integer number (241072).

Almost surely, 2^11551995 is an apocalyptic number.

11551995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11551995 is an abundant number, since it is smaller than the sum of its proper divisors (14483781).

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

11551995 is a wasteful number, since it uses less digits than its factorization.

11551995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 59 counting only the distinct ones).

The product of its digits is 10125, while the sum is 36.

The square root of 11551995 is about 3398.8225902509. The cubic root of 11551995 is about 226.0575401039.

The spelling of 11551995 in words is "eleven million, five hundred fifty-one thousand, nine hundred ninety-five".