47834501521 has 3 divisors (see below), whose sum is σ = 47834720233. Its totient is φ = 47834282810.

The previous prime is 47834501489. The next prime is 47834501531. The reversal of 47834501521 is 12510543874.

The square root of 47834501521 is 218711.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 47834501521 - 2⁵ = 47834501489 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47834501531) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 109356 + ... + 328066.

Almost surely, 2^47834501521 is an apocalyptic number.

47834501521 is the 218711-st square number.

47834501521 is the 109356-th centered octagonal number.

It is an amenable number.

47834501521 is a deficient number, since it is larger than the sum of its proper divisors (218712).

47834501521 is an frugal number, since it uses more digits than its factorization.

47834501521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437422 (or 218711 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 47834501521 in words is "forty-seven billion, eight hundred thirty-four million, five hundred one thousand, five hundred twenty-one".