31149 has 6 divisors (see below), whose sum is σ = 45006. Its totient is φ = 20760.

The previous prime is 31147. The next prime is 31151. The reversal of 31149 is 94113.

It is an interprime number because it is at equal distance from previous prime (31147) and next prime (31151).

It can be written as a sum of positive squares in only one way, i.e., 22500 + 8649 = 150^2 + 93^2 .

It is not a de Polignac number, because 31149 - 2¹ = 31147 is a prime.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31149.

It is not an unprimeable number, because it can be changed into a prime (31147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1722 + ... + 1739.

It is an arithmetic number, because the mean of its divisors is an integer number (7501).

2³¹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

31149 is a deficient number, since it is larger than the sum of its proper divisors (13857).

31149 is a wasteful number, since it uses less digits than its factorization.

31149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3467 (or 3464 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 31149 is about 176.4907929610. The cubic root of 31149 is about 31.4640557499.

The spelling of 31149 in words is "thirty-one thousand, one hundred forty-nine".