54555551 has 2 divisors, whose sum is σ = 54555552. Its totient is φ = 54555550.

The previous prime is 54555511. The next prime is 54555569. The reversal of 54555551 is 15555545.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54555551 - 2¹⁴ = 54539167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54555511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27277775 + 27277776.

It is an arithmetic number, because the mean of its divisors is an integer number (27277776).

Almost surely, 2^54555551 is an apocalyptic number.

54555551 is a deficient number, since it is larger than the sum of its proper divisors (1).

54555551 is an equidigital number, since it uses as much as digits as its factorization.

54555551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62500, while the sum is 35.

The square root of 54555551 is about 7386.1729603361. The cubic root of 54555551 is about 379.2680995356.

The spelling of 54555551 in words is "fifty-four million, five hundred fifty-five thousand, five hundred fifty-one".