55255157 has 2 divisors, whose sum is σ = 55255158. Its totient is φ = 55255156.

The previous prime is 55255133. The next prime is 55255159. The reversal of 55255157 is 75155255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42588676 + 12666481 = 6526^2 + 3559^2 .

It is a cyclic number.

It is not a de Polignac number, because 55255157 - 2¹⁶ = 55189621 is a prime.

Together with 55255159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55255159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27627578 + 27627579.

It is an arithmetic number, because the mean of its divisors is an integer number (27627579).

Almost surely, 2^55255157 is an apocalyptic number.

It is an amenable number.

55255157 is a deficient number, since it is larger than the sum of its proper divisors (1).

55255157 is an equidigital number, since it uses as much as digits as its factorization.

55255157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43750, while the sum is 35.

The square root of 55255157 is about 7433.3812629247. The cubic root of 55255157 is about 380.8824298589.

The spelling of 55255157 in words is "fifty-five million, two hundred fifty-five thousand, one hundred fifty-seven".