403231313 has 8 divisors (see below), whose sum is σ = 428146560. Its totient is φ = 378448960.

The previous prime is 403231307. The next prime is 403231333. The reversal of 403231313 is 313132304.

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 403231313 - 2¹² = 403227217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (403231303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26933 + ... + 39138.

It is an arithmetic number, because the mean of its divisors is an integer number (53518320).

Almost surely, 2^403231313 is an apocalyptic number.

It is an amenable number.

403231313 is a deficient number, since it is larger than the sum of its proper divisors (24915247).

403231313 is a wasteful number, since it uses less digits than its factorization.

403231313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66447.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 403231313 is about 20080.6203340435. The cubic root of 403231313 is about 738.7850241687.

Adding to 403231313 its reverse (313132304), we get a palindrome (716363617).

Subtracting from 403231313 its reverse (313132304), we obtain a palindrome (90099009).

The spelling of 403231313 in words is "four hundred three million, two hundred thirty-one thousand, three hundred thirteen".