47352421 has 2 divisors, whose sum is σ = 47352422. Its totient is φ = 47352420.

The previous prime is 47352419. The next prime is 47352433. The reversal of 47352421 is 12425374.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44076321 + 3276100 = 6639^2 + 1810^2 .

It is a cyclic number.

It is not a de Polignac number, because 47352421 - 2¹ = 47352419 is a prime.

It is a super-2 number, since 2×47352421² = 4484503549122482, which contains 22 as substring.

Together with 47352419, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 47352421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47352401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23676210 + 23676211.

It is an arithmetic number, because the mean of its divisors is an integer number (23676211).

Almost surely, 2^47352421 is an apocalyptic number.

It is an amenable number.

47352421 is a deficient number, since it is larger than the sum of its proper divisors (1).

47352421 is an equidigital number, since it uses as much as digits as its factorization.

47352421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 28.

The square root of 47352421 is about 6881.3095410685. The cubic root of 47352421 is about 361.7823671768.

Adding to 47352421 its reverse (12425374), we get a palindrome (59777795).

The spelling of 47352421 in words is "forty-seven million, three hundred fifty-two thousand, four hundred twenty-one".