47101221 has 6 divisors (see below), whose sum is σ = 68035110. Its totient is φ = 31400808.

The previous prime is 47101199. The next prime is 47101231. The reversal of 47101221 is 12210174.

It can be written as a sum of positive squares in only one way, i.e., 34928100 + 12173121 = 5910^2 + 3489^2 .

It is not a de Polignac number, because 47101221 - 2⁶ = 47101157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47101194 and 47101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47101231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2616726 + ... + 2616743.

It is an arithmetic number, because the mean of its divisors is an integer number (11339185).

Almost surely, 2^47101221 is an apocalyptic number.

It is an amenable number.

47101221 is a deficient number, since it is larger than the sum of its proper divisors (20933889).

47101221 is a wasteful number, since it uses less digits than its factorization.

47101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5233475 (or 5233472 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 47101221 is about 6863.0329301264. The cubic root of 47101221 is about 361.1414924568.

Adding to 47101221 its reverse (12210174), we get a palindrome (59311395).

The spelling of 47101221 in words is "forty-seven million, one hundred one thousand, two hundred twenty-one".