47289286521 has 27 divisors (see below), whose sum is σ = 68868228559. Its totient is φ = 31269152112.

The previous prime is 47289286511. The next prime is 47289286531. The reversal of 47289286521 is 12568298274.

The square root of 47289286521 is 217461.

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

47289286521 is a `hidden beast` number, since 4 + 7 + 28 + 92 + 8 + 6 + 521 = 666.

It is an interprime number because it is at equal distance from previous prime (47289286511) and next prime (47289286531).

It can be written as a sum of positive squares in only one way, i.e., 43016834025 + 4272452496 = 207405^2 + 65364^2 .

It is not a de Polignac number, because 47289286521 - 2¹¹ = 47289284473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47289286501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 112862050 + ... + 112862468.

Almost surely, 2^47289286521 is an apocalyptic number.

47289286521 is the 217461-st square number.

47289286521 is the 108731-st centered octagonal number.

It is an amenable number.

47289286521 is a deficient number, since it is larger than the sum of its proper divisors (21578942038).

47289286521 is an frugal number, since it uses more digits than its factorization.

47289286521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190 (or 595 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The spelling of 47289286521 in words is "forty-seven billion, two hundred eighty-nine million, two hundred eighty-six thousand, five hundred twenty-one".