431200005421 has 2 divisors, whose sum is σ = 431200005422. Its totient is φ = 431200005420.

The previous prime is 431200005377. The next prime is 431200005449. The reversal of 431200005421 is 124500002134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267846616521 + 163353388900 = 517539^2 + 404170^2 .

It is a cyclic number.

It is not a de Polignac number, because 431200005421 - 2¹³ = 431199997229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 431200005392 and 431200005401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431200005121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215600002710 + 215600002711.

It is an arithmetic number, because the mean of its divisors is an integer number (215600002711).

Almost surely, 2^431200005421 is an apocalyptic number.

It is an amenable number.

431200005421 is a deficient number, since it is larger than the sum of its proper divisors (1).

431200005421 is an equidigital number, since it uses as much as digits as its factorization.

431200005421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 431200005421 its reverse (124500002134), we get a palindrome (555700007555).

The spelling of 431200005421 in words is "four hundred thirty-one billion, two hundred million, five thousand, four hundred twenty-one".