31523134 has 16 divisors (see below), whose sum is σ = 50178528. Its totient is φ = 14801152.

The previous prime is 31523131. The next prime is 31523143. The reversal of 31523134 is 43132513.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31523131) 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, 21282 + ... + 22714.

It is an arithmetic number, because the mean of its divisors is an integer number (3136158).

Almost surely, 2^31523134 is an apocalyptic number.

31523134 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

31523134 is a deficient number, since it is larger than the sum of its proper divisors (18655394).

31523134 is a wasteful number, since it uses less digits than its factorization.

31523134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099.

The product of its digits is 1080, while the sum is 22.

The square root of 31523134 is about 5614.5466424280. The cubic root of 31523134 is about 315.8952745421.

Adding to 31523134 its reverse (43132513), we get a palindrome (74655647).

The spelling of 31523134 in words is "thirty-one million, five hundred twenty-three thousand, one hundred thirty-four".