47577521 has 4 divisors (see below), whose sum is σ = 47616000. Its totient is φ = 47539044.

The previous prime is 47577473. The next prime is 47577587. The reversal of 47577521 is 12577574.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12577574 = 2 ⋅6288787.

It is a cyclic number.

It is not a de Polignac number, because 47577521 - 2¹⁰ = 47576497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47577421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17321 + ... + 19878.

It is an arithmetic number, because the mean of its divisors is an integer number (11904000).

Almost surely, 2^47577521 is an apocalyptic number.

It is an amenable number.

47577521 is a deficient number, since it is larger than the sum of its proper divisors (38479).

47577521 is a wasteful number, since it uses less digits than its factorization.

47577521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38478.

The product of its digits is 68600, while the sum is 38.

The square root of 47577521 is about 6897.6460477470. The cubic root of 47577521 is about 362.3547314876.

The spelling of 47577521 in words is "forty-seven million, five hundred seventy-seven thousand, five hundred twenty-one".