310020421 has 4 divisors (see below), whose sum is σ = 313030432. Its totient is φ = 307010412.

The previous prime is 310020419. The next prime is 310020433. The reversal of 310020421 is 124020013.

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: 124020013 = 13 ⋅9540001.

It is a cyclic number.

It is not a de Polignac number, because 310020421 - 2¹ = 310020419 is a prime.

It is a super-2 number, since 2×310020421² = 192225322874034482, 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 (310020461) 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, 1504851 + ... + 1505056.

It is an arithmetic number, because the mean of its divisors is an integer number (78257608).

Almost surely, 2^310020421 is an apocalyptic number.

It is an amenable number.

310020421 is a deficient number, since it is larger than the sum of its proper divisors (3010011).

310020421 is a wasteful number, since it uses less digits than its factorization.

310020421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010010.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 310020421 is about 17607.3967695398. The cubic root of 310020421 is about 676.8048058817.

Adding to 310020421 its reverse (124020013), we get a palindrome (434040434).

The spelling of 310020421 in words is "three hundred ten million, twenty thousand, four hundred twenty-one".