54791557 has 2 divisors, whose sum is σ = 54791558. Its totient is φ = 54791556.

The previous prime is 54791551. The next prime is 54791563. The reversal of 54791557 is 75519745.

It is a balanced prime because it is at equal distance from previous prime (54791551) and next prime (54791563).

It can be written as a sum of positive squares in only one way, i.e., 31741956 + 23049601 = 5634^2 + 4801^2 .

It is a cyclic number.

It is not a de Polignac number, because 54791557 - 2³ = 54791549 is a prime.

It is a super-2 number, since 2×54791557² = 6004229436968498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54791551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27395778 + 27395779.

It is an arithmetic number, because the mean of its divisors is an integer number (27395779).

Almost surely, 2^54791557 is an apocalyptic number.

It is an amenable number.

54791557 is a deficient number, since it is larger than the sum of its proper divisors (1).

54791557 is an equidigital number, since it uses as much as digits as its factorization.

54791557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 220500, while the sum is 43.

The square root of 54791557 is about 7402.1319226288. The cubic root of 54791557 is about 379.8142143532.

The spelling of 54791557 in words is "fifty-four million, seven hundred ninety-one thousand, five hundred fifty-seven".