47812561 has 16 divisors (see below), whose sum is σ = 52214400. Its totient is φ = 43642368.

The previous prime is 47812559. The next prime is 47812613. The reversal of 47812561 is 16521874.

It is a cyclic number.

It is not a de Polignac number, because 47812561 - 2¹ = 47812559 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47012561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64330 + ... + 65068.

It is an arithmetic number, because the mean of its divisors is an integer number (3263400).

Almost surely, 2^47812561 is an apocalyptic number.

It is an amenable number.

47812561 is a deficient number, since it is larger than the sum of its proper divisors (4401839).

47812561 is a wasteful number, since it uses less digits than its factorization.

47812561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888.

The product of its digits is 13440, while the sum is 34.

The square root of 47812561 is about 6914.6627538876. The cubic root of 47812561 is about 362.9504469338.

The spelling of 47812561 in words is "forty-seven million, eight hundred twelve thousand, five hundred sixty-one".