47405561 has 4 divisors (see below), whose sum is σ = 54177792. Its totient is φ = 40633332.

The previous prime is 47405557. The next prime is 47405573. The reversal of 47405561 is 16550474.

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.

It is a cyclic number.

It is not a de Polignac number, because 47405561 - 2² = 47405557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47405521) 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, 3386105 + ... + 3386118.

It is an arithmetic number, because the mean of its divisors is an integer number (13544448).

Almost surely, 2^47405561 is an apocalyptic number.

It is an amenable number.

47405561 is a deficient number, since it is larger than the sum of its proper divisors (6772231).

47405561 is an equidigital number, since it uses as much as digits as its factorization.

47405561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6772230.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 47405561 is about 6885.1696420640. The cubic root of 47405561 is about 361.9176501426.

It can be divided in two parts, 4740 and 5561, that added together give a palindrome (10301).

The spelling of 47405561 in words is "forty-seven million, four hundred five thousand, five hundred sixty-one".