55871251 has 2 divisors, whose sum is σ = 55871252. Its totient is φ = 55871250.

The previous prime is 55871239. The next prime is 55871273. The reversal of 55871251 is 15217855.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55871251 is a prime.

It is not a weakly prime, because it can be changed into another prime (55871351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27935625 + 27935626.

It is an arithmetic number, because the mean of its divisors is an integer number (27935626).

Almost surely, 2^55871251 is an apocalyptic number.

55871251 is a deficient number, since it is larger than the sum of its proper divisors (1).

55871251 is an equidigital number, since it uses as much as digits as its factorization.

55871251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14000, while the sum is 34.

The square root of 55871251 is about 7474.7074190232. The cubic root of 55871251 is about 382.2928115970.

The spelling of 55871251 in words is "fifty-five million, eight hundred seventy-one thousand, two hundred fifty-one".