31148409 has 8 divisors (see below), whose sum is σ = 41582080. Its totient is φ = 20740176.

The previous prime is 31148393. The next prime is 31148419. The reversal of 31148409 is 90484113.

It is a happy number.

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

It is not a de Polignac number, because 31148409 - 2⁴ = 31148393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31148419) 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, 3289 + ... + 8550.

It is an arithmetic number, because the mean of its divisors is an integer number (5197760).

Almost surely, 2^31148409 is an apocalyptic number.

It is an amenable number.

31148409 is a deficient number, since it is larger than the sum of its proper divisors (10433671).

31148409 is a wasteful number, since it uses less digits than its factorization.

31148409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12719.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 31148409 is about 5581.0759715309. The cubic root of 31148409 is about 314.6385675607.

The spelling of 31148409 in words is "thirty-one million, one hundred forty-eight thousand, four hundred nine".