47611521 has 12 divisors (see below), whose sum is σ = 68840148. Its totient is φ = 31709664.

The previous prime is 47611513. The next prime is 47611559. The reversal of 47611521 is 12511674.

It is a happy number.

47611521 is a `hidden beast` number, since 47 + 611 + 5 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 47114496 + 497025 = 6864^2 + 705^2 .

It is not a de Polignac number, because 47611521 - 2³ = 47611513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47611021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10431 + ... + 14283.

It is an arithmetic number, because the mean of its divisors is an integer number (5736679).

Almost surely, 2^47611521 is an apocalyptic number.

It is an amenable number.

47611521 is a deficient number, since it is larger than the sum of its proper divisors (21228627).

47611521 is a wasteful number, since it uses less digits than its factorization.

47611521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5232 (or 5229 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 47611521 is about 6900.1102165110. The cubic root of 47611521 is about 362.4410266331.

It can be divided in two parts, 4761 and 1521, that multiplied together give a square (7241481 = 2691²).

The spelling of 47611521 in words is "forty-seven million, six hundred eleven thousand, five hundred twenty-one".