427221313 has 2 divisors, whose sum is σ = 427221314. Its totient is φ = 427221312.

The previous prime is 427221259. The next prime is 427221341. The reversal of 427221313 is 313122724.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 356190129 + 71031184 = 18873^2 + 8428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427221313 is a prime.

It is a super-3 number, since 3×427221313³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (427221913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213610656 + 213610657.

It is an arithmetic number, because the mean of its divisors is an integer number (213610657).

Almost surely, 2^427221313 is an apocalyptic number.

It is an amenable number.

427221313 is a deficient number, since it is larger than the sum of its proper divisors (1).

427221313 is an equidigital number, since it uses as much as digits as its factorization.

427221313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 25.

The square root of 427221313 is about 20669.3326694405. The cubic root of 427221313 is about 753.1548957170.

The spelling of 427221313 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, three hundred thirteen".