55545157 has 2 divisors, whose sum is σ = 55545158. Its totient is φ = 55545156.

The previous prime is 55545109. The next prime is 55545163. The reversal of 55545157 is 75154555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31427236 + 24117921 = 5606^2 + 4911^2 .

It is a cyclic number.

It is not a de Polignac number, because 55545157 - 2¹¹ = 55543109 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 (55545107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27772578 + 27772579.

It is an arithmetic number, because the mean of its divisors is an integer number (27772579).

Almost surely, 2^55545157 is an apocalyptic number.

It is an amenable number.

55545157 is a deficient number, since it is larger than the sum of its proper divisors (1).

55545157 is an equidigital number, since it uses as much as digits as its factorization.

55545157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87500, while the sum is 37.

The square root of 55545157 is about 7452.8623360424. The cubic root of 55545157 is about 381.5476059497.

The spelling of 55545157 in words is "fifty-five million, five hundred forty-five thousand, one hundred fifty-seven".