31129148 has 6 divisors (see below), whose sum is σ = 54476016. Its totient is φ = 15564572.

The previous prime is 31129141. The next prime is 31129187. The reversal of 31129148 is 84192113.

It is a self number, because there is not a number n which added to its sum of digits gives 31129148.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31129141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3891140 + ... + 3891147.

It is an arithmetic number, because the mean of its divisors is an integer number (9079336).

Almost surely, 2^31129148 is an apocalyptic number.

It is an amenable number.

31129148 is a deficient number, since it is larger than the sum of its proper divisors (23346868).

31129148 is a wasteful number, since it uses less digits than its factorization.

31129148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7782291 (or 7782289 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 31129148 is about 5579.3501413695. The cubic root of 31129148 is about 314.5737006519.

The spelling of 31129148 in words is "thirty-one million, one hundred twenty-nine thousand, one hundred forty-eight".