331231401 has 24 divisors (see below), whose sum is σ = 486570240. Its totient is φ = 217089600.

The previous prime is 331231393. The next prime is 331231421. The reversal of 331231401 is 104132133.

331231401 is a `hidden beast` number, since 3 + 31 + 231 + 401 = 666.

It is not a de Polignac number, because 331231401 - 2³ = 331231393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (331231421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 363136 + ... + 364046.

It is an arithmetic number, because the mean of its divisors is an integer number (20273760).

Almost surely, 2^331231401 is an apocalyptic number.

It is an amenable number.

331231401 is a deficient number, since it is larger than the sum of its proper divisors (155338839).

331231401 is a wasteful number, since it uses less digits than its factorization.

331231401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557 (or 1554 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 331231401 is about 18199.7637622031. The cubic root of 331231401 is about 691.9008017395.

Adding to 331231401 its reverse (104132133), we get a palindrome (435363534).

The spelling of 331231401 in words is "three hundred thirty-one million, two hundred thirty-one thousand, four hundred one".