431321269 has 2 divisors, whose sum is σ = 431321270. Its totient is φ = 431321268.

The previous prime is 431321251. The next prime is 431321273. The reversal of 431321269 is 962123134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239166225 + 192155044 = 15465^2 + 13862^2 .

It is a cyclic number.

It is not a de Polignac number, because 431321269 - 2⁷ = 431321141 is a prime.

It is a super-2 number, since 2×431321269² = 372076074183540722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 431321269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431321249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215660634 + 215660635.

It is an arithmetic number, because the mean of its divisors is an integer number (215660635).

Almost surely, 2^431321269 is an apocalyptic number.

It is an amenable number.

431321269 is a deficient number, since it is larger than the sum of its proper divisors (1).

431321269 is an equidigital number, since it uses as much as digits as its factorization.

431321269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 431321269 is about 20768.2755422784. The cubic root of 431321269 is about 755.5565208089.

The spelling of 431321269 in words is "four hundred thirty-one million, three hundred twenty-one thousand, two hundred sixty-nine".