47209261 has 4 divisors (see below), whose sum is σ = 51501024. Its totient is φ = 42917500.

The previous prime is 47209247. The next prime is 47209301. The reversal of 47209261 is 16290274.

47209261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 47209261 - 2¹⁹ = 46684973 is a prime.

It is a super-2 number, since 2×47209261² = 4457428648332242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47200261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2145865 + ... + 2145886.

It is an arithmetic number, because the mean of its divisors is an integer number (12875256).

Almost surely, 2^47209261 is an apocalyptic number.

It is an amenable number.

47209261 is a deficient number, since it is larger than the sum of its proper divisors (4291763).

47209261 is a wasteful number, since it uses less digits than its factorization.

47209261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4291762.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 47209261 is about 6870.8995772024. The cubic root of 47209261 is about 361.4174083902.

The spelling of 47209261 in words is "forty-seven million, two hundred nine thousand, two hundred sixty-one".