331430144 has 18 divisors (see below), whose sum is σ = 661566150. Its totient is φ = 165714944.

The previous prime is 331430123. The next prime is 331430153. The reversal of 331430144 is 441034133.

It can be written as a sum of positive squares in only one way, i.e., 328044544 + 3385600 = 18112^2 + 1840^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647069 + ... + 647580.

It is an arithmetic number, because the mean of its divisors is an integer number (36753675).

Almost surely, 2^331430144 is an apocalyptic number.

It is an amenable number.

331430144 is a deficient number, since it is larger than the sum of its proper divisors (330136006).

331430144 is an equidigital number, since it uses as much as digits as its factorization.

331430144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294665 (or 1294651 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 331430144 is about 18205.2229868244. Note that the first 3 decimals coincide. The cubic root of 331430144 is about 692.0391571280.

Adding to 331430144 its reverse (441034133), we get a palindrome (772464277).

The spelling of 331430144 in words is "three hundred thirty-one million, four hundred thirty thousand, one hundred forty-four".