31145653 has 8 divisors (see below), whose sum is σ = 38831040. Its totient is φ = 24269280.

The previous prime is 31145629. The next prime is 31145663. The reversal of 31145653 is 35654113.

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

It is not a de Polignac number, because 31145653 - 2²¹ = 29048501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145663) 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 7 ways as a sum of consecutive naturals, for example, 202168 + ... + 202321.

It is an arithmetic number, because the mean of its divisors is an integer number (4853880).

Almost surely, 2^31145653 is an apocalyptic number.

It is an amenable number.

31145653 is a deficient number, since it is larger than the sum of its proper divisors (7685387).

31145653 is a wasteful number, since it uses less digits than its factorization.

31145653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404507.

The product of its digits is 5400, while the sum is 28.

The square root of 31145653 is about 5580.8290602741. The cubic root of 31145653 is about 314.6292875847.

Adding to 31145653 its reverse (35654113), we get a palindrome (66799766).

The spelling of 31145653 in words is "thirty-one million, one hundred forty-five thousand, six hundred fifty-three".