31197147 has 8 divisors (see below), whose sum is σ = 41635344. Its totient is φ = 20778528.

The previous prime is 31197139. The next prime is 31197157. The reversal of 31197147 is 74179113.

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

It is not a de Polignac number, because 31197147 - 2³ = 31197139 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (31197157) 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, 648 + ... + 7925.

It is an arithmetic number, because the mean of its divisors is an integer number (5204418).

Almost surely, 2^31197147 is an apocalyptic number.

31197147 is a deficient number, since it is larger than the sum of its proper divisors (10438197).

31197147 is a wasteful number, since it uses less digits than its factorization.

31197147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9789.

The product of its digits is 5292, while the sum is 33.

The square root of 31197147 is about 5585.4406272021. The cubic root of 31197147 is about 314.8025873163.

The spelling of 31197147 in words is "thirty-one million, one hundred ninety-seven thousand, one hundred forty-seven".