431275381 has 2 divisors, whose sum is σ = 431275382. Its totient is φ = 431275380.

The previous prime is 431275373. The next prime is 431275417. The reversal of 431275381 is 183572134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417548356 + 13727025 = 20434^2 + 3705^2 .

It is a cyclic number.

It is not a de Polignac number, because 431275381 - 2³ = 431275373 is a prime.

It is a super-2 number, since 2×431275381² = 371996908513390322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431275331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215637690 + 215637691.

It is an arithmetic number, because the mean of its divisors is an integer number (215637691).

Almost surely, 2^431275381 is an apocalyptic number.

It is an amenable number.

431275381 is a deficient number, since it is larger than the sum of its proper divisors (1).

431275381 is an equidigital number, since it uses as much as digits as its factorization.

431275381 is an evil number, because the sum of its binary digits is even.

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

The square root of 431275381 is about 20767.1707509714. The cubic root of 431275381 is about 755.5297254634.

The spelling of 431275381 in words is "four hundred thirty-one million, two hundred seventy-five thousand, three hundred eighty-one".