54197281 has 2 divisors, whose sum is σ = 54197282. Its totient is φ = 54197280.

The previous prime is 54197279. The next prime is 54197293. The reversal of 54197281 is 18279145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36481600 + 17715681 = 6040^2 + 4209^2 .

It is a cyclic number.

It is not a de Polignac number, because 54197281 - 2¹ = 54197279 is a prime.

It is a super-2 number, since 2×54197281² = 5874690535585922, which contains 22 as substring.

Together with 54197279, 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 54197281.

It is not a weakly prime, because it can be changed into another prime (54197881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27098640 + 27098641.

It is an arithmetic number, because the mean of its divisors is an integer number (27098641).

Almost surely, 2^54197281 is an apocalyptic number.

It is an amenable number.

54197281 is a deficient number, since it is larger than the sum of its proper divisors (1).

54197281 is an equidigital number, since it uses as much as digits as its factorization.

54197281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 37.

The square root of 54197281 is about 7361.8802625416. The cubic root of 54197281 is about 378.4360490554.

The spelling of 54197281 in words is "fifty-four million, one hundred ninety-seven thousand, two hundred eighty-one".