55604257 has 2 divisors, whose sum is σ = 55604258. Its totient is φ = 55604256.

The previous prime is 55604251. The next prime is 55604291. The reversal of 55604257 is 75240655.

It is an a-pointer prime, because the next prime (55604291) can be obtained adding 55604257 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55591936 + 12321 = 7456^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 55604257 - 2¹⁵ = 55571489 is a prime.

It is not a weakly prime, because it can be changed into another prime (55604251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27802128 + 27802129.

It is an arithmetic number, because the mean of its divisors is an integer number (27802129).

Almost surely, 2^55604257 is an apocalyptic number.

It is an amenable number.

55604257 is a deficient number, since it is larger than the sum of its proper divisors (1).

55604257 is an equidigital number, since it uses as much as digits as its factorization.

55604257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 55604257 is about 7456.8262015418. The cubic root of 55604257 is about 381.6828800937.

The spelling of 55604257 in words is "fifty-five million, six hundred four thousand, two hundred fifty-seven".