54817381 has 2 divisors, whose sum is σ = 54817382. Its totient is φ = 54817380.

The previous prime is 54817327. The next prime is 54817397. The reversal of 54817381 is 18371845.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48233025 + 6584356 = 6945^2 + 2566^2 .

It is a cyclic number.

It is not a de Polignac number, because 54817381 - 2⁷ = 54817253 is a prime.

It is a super-2 number, since 2×54817381² = 6009890519398322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 54817381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54817481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27408690 + 27408691.

It is an arithmetic number, because the mean of its divisors is an integer number (27408691).

Almost surely, 2^54817381 is an apocalyptic number.

It is an amenable number.

54817381 is a deficient number, since it is larger than the sum of its proper divisors (1).

54817381 is an equidigital number, since it uses as much as digits as its factorization.

54817381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 37.

The square root of 54817381 is about 7403.8760794600. The cubic root of 54817381 is about 379.8738755023.

The spelling of 54817381 in words is "fifty-four million, eight hundred seventeen thousand, three hundred eighty-one".