31148289 has 6 divisors (see below), whose sum is σ = 44991986. Its totient is φ = 20765520.

The previous prime is 31148287. The next prime is 31148363. The reversal of 31148289 is 98284113.

It can be written as a sum of positive squares in only one way, i.e., 16769025 + 14379264 = 4095^2 + 3792^2 .

It is not a de Polignac number, because 31148289 - 2¹ = 31148287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31148281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1730452 + ... + 1730469.

Almost surely, 2^31148289 is an apocalyptic number.

It is an amenable number.

31148289 is a deficient number, since it is larger than the sum of its proper divisors (13843697).

31148289 is a wasteful number, since it uses less digits than its factorization.

31148289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3460927 (or 3460924 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 31148289 is about 5581.0652209054. The cubic root of 31148289 is about 314.6381635093.

The spelling of 31148289 in words is "thirty-one million, one hundred forty-eight thousand, two hundred eighty-nine".