47217261 has 32 divisors (see below), whose sum is σ = 81571840. Its totient is φ = 23592384.

The previous prime is 47217251. The next prime is 47217263. The reversal of 47217261 is 16271274.

It is not a de Polignac number, because 47217261 - 2⁹ = 47216749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47217263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 636 + ... + 9738.

It is an arithmetic number, because the mean of its divisors is an integer number (2549120).

Almost surely, 2^47217261 is an apocalyptic number.

It is an amenable number.

47217261 is a deficient number, since it is larger than the sum of its proper divisors (34354579).

47217261 is a wasteful number, since it uses less digits than its factorization.

47217261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9145.

The product of its digits is 4704, while the sum is 30.

The square root of 47217261 is about 6871.4817179412. The cubic root of 47217261 is about 361.4378222941.

The spelling of 47217261 in words is "forty-seven million, two hundred seventeen thousand, two hundred sixty-one".