331665425 has 48 divisors (see below), whose sum is σ = 532882560. Its totient is φ = 198858240.

The previous prime is 331665421. The next prime is 331665437. The reversal of 331665425 is 524566133.

It is not a de Polignac number, because 331665425 - 2² = 331665421 is a prime.

It is a super-2 number, since 2×331665425² = 220003908280861250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (331665421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39389 + ... + 47061.

It is an arithmetic number, because the mean of its divisors is an integer number (11101720).

Almost surely, 2^331665425 is an apocalyptic number.

331665425 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

331665425 is a deficient number, since it is larger than the sum of its proper divisors (201217135).

331665425 is a wasteful number, since it uses less digits than its factorization.

331665425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7722 (or 7717 counting only the distinct ones).

The product of its digits is 64800, while the sum is 35.

The square root of 331665425 is about 18211.6837497251. The cubic root of 331665425 is about 692.2028770489.

The spelling of 331665425 in words is "three hundred thirty-one million, six hundred sixty-five thousand, four hundred twenty-five".