54215971 has 2 divisors, whose sum is σ = 54215972. Its totient is φ = 54215970.

The previous prime is 54215963. The next prime is 54216013. The reversal of 54215971 is 17951245.

54215971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54215971 - 2³ = 54215963 is a prime.

It is a super-2 number, since 2×54215971² = 5878743022945682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (54215171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27107985 + 27107986.

It is an arithmetic number, because the mean of its divisors is an integer number (27107986).

Almost surely, 2^54215971 is an apocalyptic number.

54215971 is a deficient number, since it is larger than the sum of its proper divisors (1).

54215971 is an equidigital number, since it uses as much as digits as its factorization.

54215971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 34.

The square root of 54215971 is about 7363.1495299226. The cubic root of 54215971 is about 378.4795454372.

The spelling of 54215971 in words is "fifty-four million, two hundred fifteen thousand, nine hundred seventy-one".