427221511 has 2 divisors, whose sum is σ = 427221512. Its totient is φ = 427221510.

The previous prime is 427221497. The next prime is 427221539. The reversal of 427221511 is 115122724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 427221511 - 2²⁷ = 293003783 is a prime.

It is a super-2 number, since 2×427221511² = 365036438922246242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427221581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213610755 + 213610756.

It is an arithmetic number, because the mean of its divisors is an integer number (213610756).

Almost surely, 2^427221511 is an apocalyptic number.

427221511 is a deficient number, since it is larger than the sum of its proper divisors (1).

427221511 is an equidigital number, since it uses as much as digits as its factorization.

427221511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 25.

The square root of 427221511 is about 20669.3374591446. The cubic root of 427221511 is about 753.1550120694.

The spelling of 427221511 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, five hundred eleven".