31204129 has 8 divisors (see below), whose sum is σ = 36043488. Its totient is φ = 26698560.

The previous prime is 31204127. The next prime is 31204133. The reversal of 31204129 is 92140213.

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

It is a cyclic number.

It is not a de Polignac number, because 31204129 - 2¹ = 31204127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31204127) 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 7 ways as a sum of consecutive naturals, for example, 83247 + ... + 83620.

It is an arithmetic number, because the mean of its divisors is an integer number (4505436).

Almost surely, 2^31204129 is an apocalyptic number.

It is an amenable number.

31204129 is a deficient number, since it is larger than the sum of its proper divisors (4839359).

31204129 is a wasteful number, since it uses less digits than its factorization.

31204129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166895.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 31204129 is about 5586.0656100694. The cubic root of 31204129 is about 314.8260701016.

The spelling of 31204129 in words is "thirty-one million, two hundred four thousand, one hundred twenty-nine".