331601225 has 12 divisors (see below), whose sum is σ = 425365260. Its totient is φ = 256132800.

The previous prime is 331601177. The next prime is 331601279. The reversal of 331601225 is 522106133.

It can be written as a sum of positive squares in 6 ways, for example, as 49730704 + 281870521 = 7052^2 + 16789^2 .

It is not a de Polignac number, because 331601225 - 2⁶ = 331601161 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 331601225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227966 + ... + 229415.

It is an arithmetic number, because the mean of its divisors is an integer number (35447105).

Almost surely, 2^331601225 is an apocalyptic number.

It is an amenable number.

331601225 is a deficient number, since it is larger than the sum of its proper divisors (93764035).

331601225 is a wasteful number, since it uses less digits than its factorization.

331601225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457420 (or 457415 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 331601225 is about 18209.9210596861. The cubic root of 331601225 is about 692.1582112612.

Adding to 331601225 its reverse (522106133), we get a palindrome (853707358).

The spelling of 331601225 in words is "three hundred thirty-one million, six hundred one thousand, two hundred twenty-five".