431601463021 has 4 divisors (see below), whose sum is σ = 431778278844. Its totient is φ = 431424647200.

The previous prime is 431601463019. The next prime is 431601463093. The reversal of 431601463021 is 120364106134.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120364106134 = 2 ⋅60182053067.

It can be written as a sum of positive squares in 2 ways, for example, as 122070576996 + 309530886025 = 349386^2 + 556355^2 .

It is a cyclic number.

It is not a de Polignac number, because 431601463021 - 2¹ = 431601463019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431601463121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88404250 + ... + 88409131.

It is an arithmetic number, because the mean of its divisors is an integer number (107944569711).

Almost surely, 2^431601463021 is an apocalyptic number.

It is an amenable number.

431601463021 is a deficient number, since it is larger than the sum of its proper divisors (176815823).

431601463021 is a wasteful number, since it uses less digits than its factorization.

431601463021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176815822.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 431601463021 its reverse (120364106134), we get a palindrome (551965569155).

The spelling of 431601463021 in words is "four hundred thirty-one billion, six hundred one million, four hundred sixty-three thousand, twenty-one".