11271631 has 16 divisors (see below), whose sum is σ = 13434880. Its totient is φ = 9253440.

The previous prime is 11271619. The next prime is 11271661. The reversal of 11271631 is 13617211.

It is not a de Polignac number, because 11271631 - 2¹⁹ = 10747343 is a prime.

It is a super-2 number, since 2×11271631² = 254099330800322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11271661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27355 + ... + 27763.

It is an arithmetic number, because the mean of its divisors is an integer number (839680).

Almost surely, 2^11271631 is an apocalyptic number.

11271631 is a deficient number, since it is larger than the sum of its proper divisors (2163249).

11271631 is a wasteful number, since it uses less digits than its factorization.

11271631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574.

The product of its digits is 252, while the sum is 22.

The square root of 11271631 is about 3357.3249768231. The cubic root of 11271631 is about 224.2137561478.

Adding to 11271631 its reverse (13617211), we get a palindrome (24888842).

The spelling of 11271631 in words is "eleven million, two hundred seventy-one thousand, six hundred thirty-one".