54381557 has 2 divisors, whose sum is σ = 54381558. Its totient is φ = 54381556.

The previous prime is 54381511. The next prime is 54381577. The reversal of 54381557 is 75518345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46321636 + 8059921 = 6806^2 + 2839^2 .

It is a cyclic number.

It is not a de Polignac number, because 54381557 - 2¹² = 54377461 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54381557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54381577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27190778 + 27190779.

It is an arithmetic number, because the mean of its divisors is an integer number (27190779).

Almost surely, 2^54381557 is an apocalyptic number.

It is an amenable number.

54381557 is a deficient number, since it is larger than the sum of its proper divisors (1).

54381557 is an equidigital number, since it uses as much as digits as its factorization.

54381557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 38.

The square root of 54381557 is about 7374.3851947128. The cubic root of 54381557 is about 378.8644702597.

The spelling of 54381557 in words is "fifty-four million, three hundred eighty-one thousand, five hundred fifty-seven".