421922251 has 2 divisors, whose sum is σ = 421922252. Its totient is φ = 421922250.

The previous prime is 421922233. The next prime is 421922273. The reversal of 421922251 is 152229124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421922251 - 2⁵ = 421922219 is a prime.

It is a super-3 number, since 3×421922251³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (421922231) 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 as a sum of consecutive naturals, namely, 210961125 + 210961126.

It is an arithmetic number, because the mean of its divisors is an integer number (210961126).

Almost surely, 2^421922251 is an apocalyptic number.

421922251 is a deficient number, since it is larger than the sum of its proper divisors (1).

421922251 is an equidigital number, since it uses as much as digits as its factorization.

421922251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 28.

The square root of 421922251 is about 20540.7461159521. The cubic root of 421922251 is about 750.0279995473.

The spelling of 421922251 in words is "four hundred twenty-one million, nine hundred twenty-two thousand, two hundred fifty-one".