331440563 has 4 divisors (see below), whose sum is σ = 331705080. Its totient is φ = 331176048.

The previous prime is 331440559. The next prime is 331440587. The reversal of 331440563 is 365044133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365044133 = 563 ⋅648391.

It is a cyclic number.

It is not a de Polignac number, because 331440563 - 2² = 331440559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331440523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130370 + ... + 132887.

It is an arithmetic number, because the mean of its divisors is an integer number (82926270).

Almost surely, 2^331440563 is an apocalyptic number.

331440563 is a deficient number, since it is larger than the sum of its proper divisors (264517).

331440563 is a wasteful number, since it uses less digits than its factorization.

331440563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264516.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 331440563 is about 18205.5091387195. The cubic root of 331440563 is about 692.0464088124.

Adding to 331440563 its reverse (365044133), we get a palindrome (696484696).

The spelling of 331440563 in words is "three hundred thirty-one million, four hundred forty thousand, five hundred sixty-three".