431163645052421 has 16 divisors (see below), whose sum is σ = 448738082411520. Its totient is φ = 413934483740400.

The previous prime is 431163645052373. The next prime is 431163645052429. The reversal of 431163645052421 is 124250546361134.

It is a de Polignac number, because none of the positive numbers 2^k-431163645052421 is a prime.

It is a super-2 number, since 2×431163645052421² (a number of 30 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 (431163645052429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3193796 + ... + 29538578.

It is an arithmetic number, because the mean of its divisors is an integer number (28046130150720).

Almost surely, 2^{431163645052421} is an apocalyptic number.

It is an amenable number.

431163645052421 is a deficient number, since it is larger than the sum of its proper divisors (17574437359099).

431163645052421 is a wasteful number, since it uses less digits than its factorization.

431163645052421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26351336.

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 431163645052421 in words is "four hundred thirty-one trillion, one hundred sixty-three billion, six hundred forty-five million, fifty-two thousand, four hundred twenty-one".