47220451 has 2 divisors, whose sum is σ = 47220452. Its totient is φ = 47220450.

The previous prime is 47220431. The next prime is 47220517. The reversal of 47220451 is 15402274.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47220451 - 2¹⁷ = 47089379 is a prime.

It is equal to p_2844142 and since 47220451 and 2844142 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (47220401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23610225 + 23610226.

It is an arithmetic number, because the mean of its divisors is an integer number (23610226).

Almost surely, 2^47220451 is an apocalyptic number.

47220451 is a deficient number, since it is larger than the sum of its proper divisors (1).

47220451 is an equidigital number, since it uses as much as digits as its factorization.

47220451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 47220451 is about 6871.7138328076. The cubic root of 47220451 is about 361.4459616953.

The spelling of 47220451 in words is "forty-seven million, two hundred twenty thousand, four hundred fifty-one".