431400242421 has 6 divisors (see below), whose sum is σ = 623133683510. Its totient is φ = 287600161608.

The previous prime is 431400242419. The next prime is 431400242431. The reversal of 431400242421 is 124242004134.

It can be written as a sum of positive squares in only one way, i.e., 353684741796 + 77715500625 = 594714^2 + 278775^2 .

It is not a de Polignac number, because 431400242421 - 2¹ = 431400242419 is a prime.

It is a super-2 number, since 2×431400242421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431400242431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23966680126 + ... + 23966680143.

Almost surely, 2^431400242421 is an apocalyptic number.

It is an amenable number.

431400242421 is a deficient number, since it is larger than the sum of its proper divisors (191733441089).

431400242421 is a wasteful number, since it uses less digits than its factorization.

431400242421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47933360275 (or 47933360272 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 431400242421 its reverse (124242004134), we get a palindrome (555642246555).

The spelling of 431400242421 in words is "four hundred thirty-one billion, four hundred million, two hundred forty-two thousand, four hundred twenty-one".