431666521514101 has 4 divisors (see below), whose sum is σ = 431697963477100. Its totient is φ = 431635079551104.

The previous prime is 431666521514089. The next prime is 431666521514147. The reversal of 431666521514101 is 101415125666134.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76168732600900 + 355497788913201 = 8727470^2 + 18854649^2 .

It is a cyclic number.

It is not a de Polignac number, because 431666521514101 - 2¹⁷ = 431666521383029 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 (431666521514191) 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, 15720960906 + ... + 15720988363.

It is an arithmetic number, because the mean of its divisors is an integer number (107924490869275).

Almost surely, 2^{431666521514101} is an apocalyptic number.

It is an amenable number.

431666521514101 is a deficient number, since it is larger than the sum of its proper divisors (31441962999).

431666521514101 is a wasteful number, since it uses less digits than its factorization.

431666521514101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31441962998.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 431666521514101 in words is "four hundred thirty-one trillion, six hundred sixty-six billion, five hundred twenty-one million, five hundred fourteen thousand, one hundred one".