431161265633321 has 4 divisors (see below), whose sum is σ = 441677394063444. Its totient is φ = 420645137203200.

The previous prime is 431161265633297. The next prime is 431161265633333. The reversal of 431161265633321 is 123336562161134.

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 12571598466025 + 418589667167296 = 3545645^2 + 20459464^2 .

It is a cyclic number.

It is not a de Polignac number, because 431161265633321 - 2¹⁰ = 431161265632297 is a prime.

It is a super-4 number, since 4×431161265633321⁴ (a number of 60 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (431161265633381) 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, 5258064215000 + ... + 5258064215081.

It is an arithmetic number, because the mean of its divisors is an integer number (110419348515861).

Almost surely, 2^{431161265633321} is an apocalyptic number.

431161265633321 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

431161265633321 is a deficient number, since it is larger than the sum of its proper divisors (10516128430123).

431161265633321 is a wasteful number, since it uses less digits than its factorization.

431161265633321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10516128430122.

The product of its digits is 1399680, while the sum is 47.

The spelling of 431161265633321 in words is "four hundred thirty-one trillion, one hundred sixty-one billion, two hundred sixty-five million, six hundred thirty-three thousand, three hundred twenty-one".