314278021 has 4 divisors (see below), whose sum is σ = 318704544. Its totient is φ = 309851500.

The previous prime is 314278007. The next prime is 314278033. The reversal of 314278021 is 120872413.

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.

It is a cyclic number.

It is not a de Polignac number, because 314278021 - 2¹⁹ = 313753733 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 (314278001) 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, 2213155 + ... + 2213296.

It is an arithmetic number, because the mean of its divisors is an integer number (79676136).

Almost surely, 2^314278021 is an apocalyptic number.

It is an amenable number.

314278021 is a deficient number, since it is larger than the sum of its proper divisors (4426523).

314278021 is an equidigital number, since it uses as much as digits as its factorization.

314278021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4426522.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 314278021 is about 17727.8882273101. Note that the first 3 decimals coincide. The cubic root of 314278021 is about 679.8889820202. Note that the first 3 decimals are identical.

The spelling of 314278021 in words is "three hundred fourteen million, two hundred seventy-eight thousand, twenty-one".