54405553 has 2 divisors, whose sum is σ = 54405554. Its totient is φ = 54405552.

The previous prime is 54405551. The next prime is 54405563. The reversal of 54405553 is 35550445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33721249 + 20684304 = 5807^2 + 4548^2 .

It is a cyclic number.

It is not a de Polignac number, because 54405553 - 2¹ = 54405551 is a prime.

Together with 54405551, it forms a pair of twin primes.

It is equal to p_3248860 and since 54405553 and 3248860 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (54405551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27202776 + 27202777.

It is an arithmetic number, because the mean of its divisors is an integer number (27202777).

Almost surely, 2^54405553 is an apocalyptic number.

It is an amenable number.

54405553 is a deficient number, since it is larger than the sum of its proper divisors (1).

54405553 is an equidigital number, since it uses as much as digits as its factorization.

54405553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30000, while the sum is 31.

The square root of 54405553 is about 7376.0119983633. The cubic root of 54405553 is about 378.9201870350.

Adding to 54405553 its reverse (35550445), we get a palindrome (89955998).

The spelling of 54405553 in words is "fifty-four million, four hundred five thousand, five hundred fifty-three".