31520134 has 8 divisors (see below), whose sum is σ = 47404800. Its totient is φ = 15718536.

The previous prime is 31520119. The next prime is 31520141. The reversal of 31520134 is 43102513.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 19809 + ... + 21340.

It is an arithmetic number, because the mean of its divisors is an integer number (5925600).

Almost surely, 2^31520134 is an apocalyptic number.

31520134 is a deficient number, since it is larger than the sum of its proper divisors (15884666).

31520134 is a wasteful number, since it uses less digits than its factorization.

31520134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41534.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 31520134 is about 5614.2794729155. The cubic root of 31520134 is about 315.8852531624.

Adding to 31520134 its reverse (43102513), we get a palindrome (74622647).

It can be divided in two parts, 315 and 20134, that added together give a square (20449 = 143²).

The spelling of 31520134 in words is "thirty-one million, five hundred twenty thousand, one hundred thirty-four".