47021081 has 2 divisors, whose sum is σ = 47021082. Its totient is φ = 47021080.

The previous prime is 47021063. The next prime is 47021083. The reversal of 47021081 is 18012074.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28185481 + 18835600 = 5309^2 + 4340^2 .

It is a cyclic number.

It is not a de Polignac number, because 47021081 - 2¹⁴ = 47004697 is a prime.

It is a super-2 number, since 2×47021081² = 4421964116817122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 47021083, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (47021083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23510540 + 23510541.

It is an arithmetic number, because the mean of its divisors is an integer number (23510541).

Almost surely, 2^47021081 is an apocalyptic number.

It is an amenable number.

47021081 is a deficient number, since it is larger than the sum of its proper divisors (1).

47021081 is an equidigital number, since it uses as much as digits as its factorization.

47021081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 47021081 is about 6857.1919179793. The cubic root of 47021081 is about 360.9365557380.

The spelling of 47021081 in words is "forty-seven million, twenty-one thousand, eighty-one".