331563361 has 4 divisors (see below), whose sum is σ = 334662192. Its totient is φ = 328464532.

The previous prime is 331563347. The next prime is 331563373. The reversal of 331563361 is 163365133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 331563361 - 2¹⁹ = 331039073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331563301) 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, 1549255 + ... + 1549468.

It is an arithmetic number, because the mean of its divisors is an integer number (83665548).

Almost surely, 2^331563361 is an apocalyptic number.

It is an amenable number.

331563361 is a deficient number, since it is larger than the sum of its proper divisors (3098831).

331563361 is a wasteful number, since it uses less digits than its factorization.

331563361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3098830.

The product of its digits is 14580, while the sum is 31.

The square root of 331563361 is about 18208.8813769545. The cubic root of 331563361 is about 692.1318654838.

The spelling of 331563361 in words is "three hundred thirty-one million, five hundred sixty-three thousand, three hundred sixty-one".