31140361 has 8 divisors (see below), whose sum is σ = 36457344. Its totient is φ = 26040480.

The previous prime is 31140349. The next prime is 31140391. The reversal of 31140361 is 16304113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31140361 - 2⁷ = 31140233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31140331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53965 + ... + 54538.

It is an arithmetic number, because the mean of its divisors is an integer number (4557168).

Almost surely, 2^31140361 is an apocalyptic number.

It is an amenable number.

31140361 is a deficient number, since it is larger than the sum of its proper divisors (5316983).

31140361 is a wasteful number, since it uses less digits than its factorization.

31140361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108551.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 31140361 is about 5580.3549170281. The cubic root of 31140361 is about 314.6114668795.

Adding to 31140361 its reverse (16304113), we get a palindrome (47444474).

The spelling of 31140361 in words is "thirty-one million, one hundred forty thousand, three hundred sixty-one".