11131551906 has 16 divisors (see below), whose sum is σ = 22806106848. Its totient is φ = 3620016800.

The previous prime is 11131551883. The next prime is 11131551919. The reversal of 11131551906 is 60915513111.

It is a super-2 number, since 2×11131551906² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22624860 + ... + 22625351.

It is an arithmetic number, because the mean of its divisors is an integer number (1425381678).

Almost surely, 2^11131551906 is an apocalyptic number.

11131551906 is an abundant number, since it is smaller than the sum of its proper divisors (11674554942).

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

11131551906 is a wasteful number, since it uses less digits than its factorization.

11131551906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45250257.

The product of its (nonzero) digits is 4050, while the sum is 33.

The spelling of 11131551906 in words is "eleven billion, one hundred thirty-one million, five hundred fifty-one thousand, nine hundred six".