331540001 has 8 divisors (see below), whose sum is σ = 378045864. Its totient is φ = 288034560.

The previous prime is 331539997. The next prime is 331540031. The reversal of 331540001 is 100045133.

It can be written as a sum of positive squares in 4 ways, for example, as 56776225 + 274763776 = 7535^2 + 16576^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 331540001 - 2² = 331539997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (331540031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749870 + ... + 750311.

It is an arithmetic number, because the mean of its divisors is an integer number (47255733).

Almost surely, 2^331540001 is an apocalyptic number.

It is an amenable number.

331540001 is a deficient number, since it is larger than the sum of its proper divisors (46505863).

331540001 is a wasteful number, since it uses less digits than its factorization.

331540001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500211.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 331540001 is about 18208.2399204316. The cubic root of 331540001 is about 692.1156105916.

Adding to 331540001 its reverse (100045133), we get a palindrome (431585134).

The spelling of 331540001 in words is "three hundred thirty-one million, five hundred forty thousand, one".