31534139 has 8 divisors (see below), whose sum is σ = 38811360. Its totient is φ = 24950016.

The previous prime is 31534121. The next prime is 31534141. The reversal of 31534139 is 93143513.

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

It is not a de Polignac number, because 31534139 - 2¹² = 31530043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31534169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173174 + ... + 173355.

It is an arithmetic number, because the mean of its divisors is an integer number (4851420).

Almost surely, 2^31534139 is an apocalyptic number.

31534139 is a deficient number, since it is larger than the sum of its proper divisors (7277221).

31534139 is a wasteful number, since it uses less digits than its factorization.

31534139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346549.

The product of its digits is 4860, while the sum is 29.

The square root of 31534139 is about 5615.5266004178. The cubic root of 31534139 is about 315.9320308602.

The spelling of 31534139 in words is "thirty-one million, five hundred thirty-four thousand, one hundred thirty-nine".