431242541 has 2 divisors, whose sum is σ = 431242542. Its totient is φ = 431242540.

The previous prime is 431242517. The next prime is 431242577. The reversal of 431242541 is 145242134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427455625 + 3786916 = 20675^2 + 1946^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431242541 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 431242541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431242501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215621270 + 215621271.

It is an arithmetic number, because the mean of its divisors is an integer number (215621271).

Almost surely, 2^431242541 is an apocalyptic number.

It is an amenable number.

431242541 is a deficient number, since it is larger than the sum of its proper divisors (1).

431242541 is an equidigital number, since it uses as much as digits as its factorization.

431242541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 26.

The square root of 431242541 is about 20766.3800649030. The cubic root of 431242541 is about 755.5105480599.

Adding to 431242541 its reverse (145242134), we get a palindrome (576484675).

The spelling of 431242541 in words is "four hundred thirty-one million, two hundred forty-two thousand, five hundred forty-one".