27591131 has 4 divisors (see below), whose sum is σ = 27808512. Its totient is φ = 27373752.

The previous prime is 27591107. The next prime is 27591133. The reversal of 27591131 is 13119572.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27591131 - 2¹⁴ = 27574747 is a prime.

It is a super-2 number, since 2×27591131² = 1522541019718322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27591094 and 27591103.

It is not an unprimeable number, because it can be changed into a prime (27591133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108500 + ... + 108753.

It is an arithmetic number, because the mean of its divisors is an integer number (6952128).

Almost surely, 2^27591131 is an apocalyptic number.

27591131 is a deficient number, since it is larger than the sum of its proper divisors (217381).

27591131 is a wasteful number, since it uses less digits than its factorization.

27591131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217380.

The product of its digits is 1890, while the sum is 29.

The square root of 27591131 is about 5252.7260541551. The cubic root of 27591131 is about 302.1735877613.

The spelling of 27591131 in words is "twenty-seven million, five hundred ninety-one thousand, one hundred thirty-one".