431244541421 has 2 divisors, whose sum is σ = 431244541422. Its totient is φ = 431244541420.

The previous prime is 431244541417. The next prime is 431244541547. The reversal of 431244541421 is 124145442134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 430500015625 + 744525796 = 656125^2 + 27286^2 .

It is a cyclic number.

It is not a de Polignac number, because 431244541421 - 2² = 431244541417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431244541411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215622270710 + 215622270711.

It is an arithmetic number, because the mean of its divisors is an integer number (215622270711).

Almost surely, 2^431244541421 is an apocalyptic number.

It is an amenable number.

431244541421 is a deficient number, since it is larger than the sum of its proper divisors (1).

431244541421 is an equidigital number, since it uses as much as digits as its factorization.

431244541421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61440, while the sum is 35.

Adding to 431244541421 its reverse (124145442134), we get a palindrome (555389983555).

The spelling of 431244541421 in words is "four hundred thirty-one billion, two hundred forty-four million, five hundred forty-one thousand, four hundred twenty-one".