313331421 has 16 divisors (see below), whose sum is σ = 450961280. Its totient is φ = 192369600.

The previous prime is 313331419. The next prime is 313331423. The reversal of 313331421 is 124133313.

It is an interprime number because it is at equal distance from previous prime (313331419) and next prime (313331423).

It is not a de Polignac number, because 313331421 - 2¹ = 313331419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313331423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7971 + ... + 26271.

It is an arithmetic number, because the mean of its divisors is an integer number (28185080).

Almost surely, 2^313331421 is an apocalyptic number.

It is an amenable number.

313331421 is a deficient number, since it is larger than the sum of its proper divisors (137629859).

313331421 is a wasteful number, since it uses less digits than its factorization.

313331421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18756.

The product of its digits is 648, while the sum is 21.

The square root of 313331421 is about 17701.1700460732. The cubic root of 313331421 is about 679.2056908954.

Adding to 313331421 its reverse (124133313), we get a palindrome (437464734).

The spelling of 313331421 in words is "three hundred thirteen million, three hundred thirty-one thousand, four hundred twenty-one".