51573047409 has 63 divisors (see below), whose sum is σ = 83859365883. Its totient is φ = 31688206992.

The previous prime is 51573047399. The next prime is 51573047419. The reversal of 51573047409 is 90474037515.

The square root of 51573047409 is 227097.

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

51573047409 is a `hidden beast` number, since 5 + 1 + 573 + 0 + 4 + 74 + 0 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (51573047399) and next prime (51573047419).

It can be written as a sum of positive squares in only one way, i.e., 7629149025 + 43943898384 = 87345^2 + 209628^2 .

It is not a de Polignac number, because 51573047409 - 2¹⁵ = 51573014641 is a prime.

It is a super-2 number, since 2×51573047409² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51573047419) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 79710724 + ... + 79711370.

Almost surely, 2^51573047409 is an apocalyptic number.

51573047409 is the 227097-th square number.

51573047409 is the 113549-th centered octagonal number.

It is an amenable number.

51573047409 is a deficient number, since it is larger than the sum of its proper divisors (32286318474).

51573047409 is an frugal number, since it uses more digits than its factorization.

51573047409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The spelling of 51573047409 in words is "fifty-one billion, five hundred seventy-three million, forty-seven thousand, four hundred nine".