432315781 has 2 divisors, whose sum is σ = 432315782. Its totient is φ = 432315780.

The previous prime is 432315769. The next prime is 432315787. The reversal of 432315781 is 187513234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408403681 + 23912100 = 20209^2 + 4890^2 .

It is a cyclic number.

It is not a de Polignac number, because 432315781 - 2⁵ = 432315749 is a prime.

It is a super-2 number, since 2×432315781² = 373793869003279922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (432315787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216157890 + 216157891.

It is an arithmetic number, because the mean of its divisors is an integer number (216157891).

Almost surely, 2^432315781 is an apocalyptic number.

It is an amenable number.

432315781 is a deficient number, since it is larger than the sum of its proper divisors (1).

432315781 is an equidigital number, since it uses as much as digits as its factorization.

432315781 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 432315781 is about 20792.2048133429. The cubic root of 432315781 is about 756.1367791160.

The spelling of 432315781 in words is "four hundred thirty-two million, three hundred fifteen thousand, seven hundred eighty-one".