54551551 has 2 divisors, whose sum is σ = 54551552. Its totient is φ = 54551550.

The previous prime is 54551543. The next prime is 54551569. The reversal of 54551551 is 15515545.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54551551 - 2³ = 54551543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54551531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27275775 + 27275776.

It is an arithmetic number, because the mean of its divisors is an integer number (27275776).

Almost surely, 2^54551551 is an apocalyptic number.

54551551 is a deficient number, since it is larger than the sum of its proper divisors (1).

54551551 is an equidigital number, since it uses as much as digits as its factorization.

54551551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12500, while the sum is 31.

The square root of 54551551 is about 7385.9021791518. The cubic root of 54551551 is about 379.2588300268.

The spelling of 54551551 in words is "fifty-four million, five hundred fifty-one thousand, five hundred fifty-one".