54111557 has 2 divisors, whose sum is σ = 54111558. Its totient is φ = 54111556.

The previous prime is 54111553. The next prime is 54111611. The reversal of 54111557 is 75511145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46977316 + 7134241 = 6854^2 + 2671^2 .

It is a cyclic number.

It is not a de Polignac number, because 54111557 - 2² = 54111553 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 (54111553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27055778 + 27055779.

It is an arithmetic number, because the mean of its divisors is an integer number (27055779).

Almost surely, 2^54111557 is an apocalyptic number.

It is an amenable number.

54111557 is a deficient number, since it is larger than the sum of its proper divisors (1).

54111557 is an equidigital number, since it uses as much as digits as its factorization.

54111557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3500, while the sum is 29.

The square root of 54111557 is about 7356.0558045735. The cubic root of 54111557 is about 378.2364192933.

The spelling of 54111557 in words is "fifty-four million, one hundred eleven thousand, five hundred fifty-seven".