31140413 has 16 divisors (see below), whose sum is σ = 34909056. Its totient is φ = 27624960.

The previous prime is 31140409. The next prime is 31140419. The reversal of 31140413 is 31404113.

It is a cyclic number.

It is not a de Polignac number, because 31140413 - 2² = 31140409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31140391 and 31140400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31140419) 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, 27998 + ... + 29088.

It is an arithmetic number, because the mean of its divisors is an integer number (2181816).

Almost surely, 2^31140413 is an apocalyptic number.

It is an amenable number.

31140413 is a deficient number, since it is larger than the sum of its proper divisors (3768643).

31140413 is a wasteful number, since it uses less digits than its factorization.

31140413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 31140413 is about 5580.3595762280. The cubic root of 31140413 is about 314.6116419983.

Adding to 31140413 its reverse (31404113), we get a palindrome (62544526).

The spelling of 31140413 in words is "thirty-one million, one hundred forty thousand, four hundred thirteen".