11171951 has 18 divisors (see below), whose sum is σ = 13617072. Its totient is φ = 9138360.

The previous prime is 11171933. The next prime is 11171957. The reversal of 11171951 is 15917111.

It is not a de Polignac number, because 11171951 - 2¹⁸ = 10909807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11171951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11171957) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 25706 + ... + 26136.

It is an arithmetic number, because the mean of its divisors is an integer number (756504).

Almost surely, 2^11171951 is an apocalyptic number.

11171951 is a deficient number, since it is larger than the sum of its proper divisors (2445121).

11171951 is an equidigital number, since it uses as much as digits as its factorization.

11171951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 461 counting only the distinct ones).

The product of its digits is 315, while the sum is 26.

The square root of 11171951 is about 3342.4468582163. The cubic root of 11171951 is about 223.5508578399.

The spelling of 11171951 in words is "eleven million, one hundred seventy-one thousand, nine hundred fifty-one".