31534645 has 8 divisors (see below), whose sum is σ = 37873080. Its totient is φ = 25206720.

The previous prime is 31534637. The next prime is 31534651. The reversal of 31534645 is 54643513.

It can be written as a sum of positive squares in 4 ways, for example, as 1962801 + 29571844 = 1401^2 + 5438^2 .

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

It is not a de Polignac number, because 31534645 - 2³ = 31534637 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 7611 + ... + 10999.

It is an arithmetic number, because the mean of its divisors is an integer number (4734135).

Almost surely, 2^31534645 is an apocalyptic number.

It is an amenable number.

31534645 is a deficient number, since it is larger than the sum of its proper divisors (6338435).

31534645 is a wasteful number, since it uses less digits than its factorization.

31534645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5255.

The product of its digits is 21600, while the sum is 31.

The square root of 31534645 is about 5615.5716538924. The cubic root of 31534645 is about 315.9337206770.

The spelling of 31534645 in words is "thirty-one million, five hundred thirty-four thousand, six hundred forty-five".