331436401 has 4 divisors (see below), whose sum is σ = 337689972. Its totient is φ = 325182832.

The previous prime is 331436381. The next prime is 331436429. The reversal of 331436401 is 104634133.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 245392225 + 86044176 = 15665^2 + 9276^2 .

It is a cyclic number.

It is not a de Polignac number, because 331436401 - 2¹⁷ = 331305329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331436461) 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 3 ways as a sum of consecutive naturals, for example, 3126706 + ... + 3126811.

It is an arithmetic number, because the mean of its divisors is an integer number (84422493).

Almost surely, 2^331436401 is an apocalyptic number.

It is an amenable number.

331436401 is a deficient number, since it is larger than the sum of its proper divisors (6253571).

331436401 is an equidigital number, since it uses as much as digits as its factorization.

331436401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6253570.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 331436401 is about 18205.3948323018. The cubic root of 331436401 is about 692.0435120545.

The spelling of 331436401 in words is "three hundred thirty-one million, four hundred thirty-six thousand, four hundred one".