55050557 has 2 divisors, whose sum is σ = 55050558. Its totient is φ = 55050556.

The previous prime is 55050547. The next prime is 55050571. The reversal of 55050557 is 75505055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42758521 + 12292036 = 6539^2 + 3506^2 .

It is a cyclic number.

It is not a de Polignac number, because 55050557 - 2⁶ = 55050493 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 (55050547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27525278 + 27525279.

It is an arithmetic number, because the mean of its divisors is an integer number (27525279).

Almost surely, 2^55050557 is an apocalyptic number.

It is an amenable number.

55050557 is a deficient number, since it is larger than the sum of its proper divisors (1).

55050557 is an equidigital number, since it uses as much as digits as its factorization.

55050557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21875, while the sum is 32.

The square root of 55050557 is about 7419.6062563993. The cubic root of 55050557 is about 380.4117351587.

The spelling of 55050557 in words is "fifty-five million, fifty thousand, five hundred fifty-seven".