54065821 has 2 divisors, whose sum is σ = 54065822. Its totient is φ = 54065820.

The previous prime is 54065813. The next prime is 54065827. The reversal of 54065821 is 12856045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52272900 + 1792921 = 7230^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 54065821 - 2³ = 54065813 is a prime.

It is a super-2 number, since 2×54065821² = 5846226000808082, which contains 22 as substring.

It is equal to p_3229870 and since 54065821 and 3229870 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54065827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27032910 + 27032911.

It is an arithmetic number, because the mean of its divisors is an integer number (27032911).

Almost surely, 2^54065821 is an apocalyptic number.

It is an amenable number.

54065821 is a deficient number, since it is larger than the sum of its proper divisors (1).

54065821 is an equidigital number, since it uses as much as digits as its factorization.

54065821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 54065821 is about 7352.9464162334. The cubic root of 54065821 is about 378.1298253238.

The spelling of 54065821 in words is "fifty-four million, sixty-five thousand, eight hundred twenty-one".