431752381 has 2 divisors, whose sum is σ = 431752382. Its totient is φ = 431752380.

The previous prime is 431752369. The next prime is 431752397. The reversal of 431752381 is 183257134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 431226756 + 525625 = 20766^2 + 725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431752381 is a prime.

It is a super-2 number, since 2×431752381² = 372820236998338322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431752351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215876190 + 215876191.

It is an arithmetic number, because the mean of its divisors is an integer number (215876191).

Almost surely, 2^431752381 is an apocalyptic number.

It is an amenable number.

431752381 is a deficient number, since it is larger than the sum of its proper divisors (1).

431752381 is an equidigital number, since it uses as much as digits as its factorization.

431752381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 431752381 is about 20778.6520496398. The cubic root of 431752381 is about 755.8081669658.

The spelling of 431752381 in words is "four hundred thirty-one million, seven hundred fifty-two thousand, three hundred eighty-one".