431960564562921 has 9 divisors (see below), whose sum is σ = 623943127764541. Its totient is φ = 287973668141292.

The previous prime is 431960564562907. The next prime is 431960564562977. The reversal of 431960564562921 is 129265465069134.

The square root of 431960564562921 is 20783661.

It is a perfect power (a square), and thus also a powerful number.

431960564562921 is a `hidden beast` number, since 4 + 3 + 1 + 9 + 6 + 0 + 5 + 64 + 562 + 9 + 2 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 431960564562921 - 2²¹ = 431960562465769 is a prime.

It is a super-2 number, since 2×431960564562921² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431960564563921) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 58887040 + ... + 65814926.

Almost surely, 2^{431960564562921} is an apocalyptic number.

431960564562921 is the 20783661-st square number.

431960564562921 is the 10391831-st centered octagonal number.

It is an amenable number.

431960564562921 is a deficient number, since it is larger than the sum of its proper divisors (191982563201620).

431960564562921 is an frugal number, since it uses more digits than its factorization.

431960564562921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13855780 (or 6927890 counting only the distinct ones).

The product of its (nonzero) digits is 83980800, while the sum is 63.

The spelling of 431960564562921 in words is "four hundred thirty-one trillion, nine hundred sixty billion, five hundred sixty-four million, five hundred sixty-two thousand, nine hundred twenty-one".