421264277431 has 2 divisors, whose sum is σ = 421264277432. Its totient is φ = 421264277430.

The previous prime is 421264277419. The next prime is 421264277449. The reversal of 421264277431 is 134772462124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421264277431 - 2²⁵ = 421230722999 is a prime.

It is a super-2 number, since 2×421264277431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421264277411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210632138715 + 210632138716.

It is an arithmetic number, because the mean of its divisors is an integer number (210632138716).

Almost surely, 2^421264277431 is an apocalyptic number.

421264277431 is a deficient number, since it is larger than the sum of its proper divisors (1).

421264277431 is an equidigital number, since it uses as much as digits as its factorization.

421264277431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 43.

The spelling of 421264277431 in words is "four hundred twenty-one billion, two hundred sixty-four million, two hundred seventy-seven thousand, four hundred thirty-one".