31161147 has 8 divisors (see below), whose sum is σ = 41574720. Its totient is φ = 20760840.

The previous prime is 31161133. The next prime is 31161149. The reversal of 31161147 is 74116113.

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

It is not a de Polignac number, because 31161147 - 2⁴ = 31161131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31161149) 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, 5572 + ... + 9662.

It is an arithmetic number, because the mean of its divisors is an integer number (5196840).

Almost surely, 2^31161147 is an apocalyptic number.

31161147 is a deficient number, since it is larger than the sum of its proper divisors (10413573).

31161147 is a wasteful number, since it uses less digits than its factorization.

31161147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6633.

The product of its digits is 504, while the sum is 24.

The square root of 31161147 is about 5582.2170326851. The cubic root of 31161147 is about 314.6814517186.

The spelling of 31161147 in words is "thirty-one million, one hundred sixty-one thousand, one hundred forty-seven".