331440445 has 8 divisors (see below), whose sum is σ = 454546944. Its totient is φ = 227273424.

The previous prime is 331440443. The next prime is 331440467. The reversal of 331440445 is 544044133.

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

It is not a de Polignac number, because 331440445 - 2¹ = 331440443 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 (331440443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4734829 + ... + 4734898.

It is an arithmetic number, because the mean of its divisors is an integer number (56818368).

Almost surely, 2^331440445 is an apocalyptic number.

331440445 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

331440445 is a deficient number, since it is larger than the sum of its proper divisors (123106499).

331440445 is an equidigital number, since it uses as much as digits as its factorization.

331440445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9469739.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 331440445 is about 18205.5058979420. The cubic root of 331440445 is about 692.0463266846.

Adding to 331440445 its reverse (544044133), we get a palindrome (875484578).

The spelling of 331440445 in words is "three hundred thirty-one million, four hundred forty thousand, four hundred forty-five".