27320031 has 32 divisors (see below), whose sum is σ = 41771520. Its totient is φ = 17641152.

The previous prime is 27319997. The next prime is 27320039. The reversal of 27320031 is 13002372.

It is a de Polignac number, because none of the positive numbers 2^k-27320031 is a prime.

It is a super-2 number, since 2×27320031² = 1492768187681922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27319986 and 27320013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27320039) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163510 + ... + 163676.

It is an arithmetic number, because the mean of its divisors is an integer number (1305360).

Almost surely, 2^27320031 is an apocalyptic number.

27320031 is a deficient number, since it is larger than the sum of its proper divisors (14451489).

27320031 is a wasteful number, since it uses less digits than its factorization.

27320031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 27320031 is about 5226.8567036030. The cubic root of 27320031 is about 301.1806474765.

The spelling of 27320031 in words is "twenty-seven million, three hundred twenty thousand, thirty-one".