54515551 has 2 divisors, whose sum is σ = 54515552. Its totient is φ = 54515550.

The previous prime is 54515533. The next prime is 54515557. The reversal of 54515551 is 15551545.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54515551 - 2⁷ = 54515423 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 (54515557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27257775 + 27257776.

It is an arithmetic number, because the mean of its divisors is an integer number (27257776).

Almost surely, 2^54515551 is an apocalyptic number.

54515551 is a deficient number, since it is larger than the sum of its proper divisors (1).

54515551 is an equidigital number, since it uses as much as digits as its factorization.

54515551 is an evil number, because the sum of its binary digits is even.

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

The square root of 54515551 is about 7383.4647016154. The cubic root of 54515551 is about 379.1753840500.

The spelling of 54515551 in words is "fifty-four million, five hundred fifteen thousand, five hundred fifty-one".