31305134 has 8 divisors (see below), whose sum is σ = 53665968. Its totient is φ = 13416480.

The previous prime is 31305083. The next prime is 31305137. The reversal of 31305134 is 43150313.

It is a happy number.

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

It is a super-2 number, since 2×31305134² = 1960022829515912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31305137) 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 in 3 ways as a sum of consecutive naturals, for example, 1118027 + ... + 1118054.

It is an arithmetic number, because the mean of its divisors is an integer number (6708246).

Almost surely, 2^31305134 is an apocalyptic number.

31305134 is a deficient number, since it is larger than the sum of its proper divisors (22360834).

31305134 is a wasteful number, since it uses less digits than its factorization.

31305134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236090.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 31305134 is about 5595.0991054672. The cubic root of 31305134 is about 315.1653922747.

Adding to 31305134 its reverse (43150313), we get a palindrome (74455447).

The spelling of 31305134 in words is "thirty-one million, three hundred five thousand, one hundred thirty-four".