331440413 has 8 divisors (see below), whose sum is σ = 343414968. Its totient is φ = 319624704.

The previous prime is 331440397. The next prime is 331440443. The reversal of 331440413 is 314044133.

It can be written as a sum of positive squares in 4 ways, for example, as 4481689 + 326958724 = 2117^2 + 18082^2 .

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 331440413 - 2⁴ = 331440397 is a prime.

It is a super-2 number, since 2×331440413² = 219705494739221138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331440443) 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, 35456 + ... + 43817.

It is an arithmetic number, because the mean of its divisors is an integer number (42926871).

Almost surely, 2^331440413 is an apocalyptic number.

It is an amenable number.

331440413 is a deficient number, since it is larger than the sum of its proper divisors (11974555).

331440413 is a wasteful number, since it uses less digits than its factorization.

331440413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79423.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 331440413 is about 18205.5050190869. The cubic root of 331440413 is about 692.0463044126.

Adding to 331440413 its reverse (314044133), we get a palindrome (645484546).

The spelling of 331440413 in words is "three hundred thirty-one million, four hundred forty thousand, four hundred thirteen".