47111561 has 8 divisors (see below), whose sum is σ = 54007104. Its totient is φ = 40257360.

The previous prime is 47111557. The next prime is 47111587. The reversal of 47111561 is 16511174.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47111561 - 2² = 47111557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47111561.

It is not an unprimeable number, because it can be changed into a prime (47111761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7850 + ... + 12483.

It is an arithmetic number, because the mean of its divisors is an integer number (6750888).

Almost surely, 2^47111561 is an apocalyptic number.

It is an amenable number.

47111561 is a deficient number, since it is larger than the sum of its proper divisors (6895543).

47111561 is a wasteful number, since it uses less digits than its factorization.

47111561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20671.

The product of its digits is 840, while the sum is 26.

The square root of 47111561 is about 6863.7862000502. The cubic root of 47111561 is about 361.1679173189.

The spelling of 47111561 in words is "forty-seven million, one hundred eleven thousand, five hundred sixty-one".