331142645 has 8 divisors (see below), whose sum is σ = 399431256. Its totient is φ = 263540736.

The previous prime is 331142639. The next prime is 331142653. The reversal of 331142645 is 546241133.

It can be written as a sum of positive squares in 4 ways, for example, as 15476356 + 315666289 = 3934^2 + 17767^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 331142645 - 2¹⁰ = 331141621 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170612 + ... + 172541.

It is an arithmetic number, because the mean of its divisors is an integer number (49928907).

Almost surely, 2^331142645 is an apocalyptic number.

It is an amenable number.

331142645 is a deficient number, since it is larger than the sum of its proper divisors (68288611).

331142645 is a wasteful number, since it uses less digits than its factorization.

331142645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343351.

The product of its digits is 8640, while the sum is 29.

The square root of 331142645 is about 18197.3252155365. The cubic root of 331142645 is about 691.8389961726.

Adding to 331142645 its reverse (546241133), we get a palindrome (877383778).

The spelling of 331142645 in words is "three hundred thirty-one million, one hundred forty-two thousand, six hundred forty-five".