312021413 has 4 divisors (see below), whose sum is σ = 340387008. Its totient is φ = 283655820.

The previous prime is 312021397. The next prime is 312021443. The reversal of 312021413 is 314120213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 314120213 = 11 ⋅28556383.

It is a cyclic number.

It is not a de Polignac number, because 312021413 - 2⁴ = 312021397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312021391 and 312021400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312021443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14182781 + ... + 14182802.

It is an arithmetic number, because the mean of its divisors is an integer number (85096752).

Almost surely, 2^312021413 is an apocalyptic number.

It is an amenable number.

312021413 is a deficient number, since it is larger than the sum of its proper divisors (28365595).

312021413 is a wasteful number, since it uses less digits than its factorization.

312021413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28365594.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 312021413 is about 17664.1278584594. The cubic root of 312021413 is about 678.2578044895.

Adding to 312021413 its reverse (314120213), we get a palindrome (626141626).

The spelling of 312021413 in words is "three hundred twelve million, twenty-one thousand, four hundred thirteen".