47225421 has 6 divisors (see below), whose sum is σ = 68214510. Its totient is φ = 31483608.

The previous prime is 47225383. The next prime is 47225441. The reversal of 47225421 is 12452274.

It can be written as a sum of positive squares in only one way, i.e., 47073321 + 152100 = 6861^2 + 390^2 .

It is not a de Polignac number, because 47225421 - 2¹⁸ = 46963277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47225441) 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, 2623626 + ... + 2623643.

It is an arithmetic number, because the mean of its divisors is an integer number (11369085).

Almost surely, 2^47225421 is an apocalyptic number.

It is an amenable number.

47225421 is a deficient number, since it is larger than the sum of its proper divisors (20989089).

47225421 is a wasteful number, since it uses less digits than its factorization.

47225421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5247275 (or 5247272 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 47225421 is about 6872.0754506917. The cubic root of 47225421 is about 361.4586421009.

Adding to 47225421 its reverse (12452274), we get a palindrome (59677695).

The spelling of 47225421 in words is "forty-seven million, two hundred twenty-five thousand, four hundred twenty-one".