55288357 has 2 divisors, whose sum is σ = 55288358. Its totient is φ = 55288356.

The previous prime is 55288349. The next prime is 55288361. The reversal of 55288357 is 75388255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34503876 + 20784481 = 5874^2 + 4559^2 .

It is a cyclic number.

It is not a de Polignac number, because 55288357 - 2³ = 55288349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55288327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27644178 + 27644179.

It is an arithmetic number, because the mean of its divisors is an integer number (27644179).

Almost surely, 2^55288357 is an apocalyptic number.

It is an amenable number.

55288357 is a deficient number, since it is larger than the sum of its proper divisors (1).

55288357 is an equidigital number, since it uses as much as digits as its factorization.

55288357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336000, while the sum is 43.

The square root of 55288357 is about 7435.6140970333. The cubic root of 55288357 is about 380.9586988478.

The spelling of 55288357 in words is "fifty-five million, two hundred eighty-eight thousand, three hundred fifty-seven".