55085971 has 2 divisors, whose sum is σ = 55085972. Its totient is φ = 55085970.

The previous prime is 55085957. The next prime is 55085983. The reversal of 55085971 is 17958055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55085971 - 2⁵ = 55085939 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55085911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27542985 + 27542986.

It is an arithmetic number, because the mean of its divisors is an integer number (27542986).

Almost surely, 2^55085971 is an apocalyptic number.

55085971 is a deficient number, since it is larger than the sum of its proper divisors (1).

55085971 is an equidigital number, since it uses as much as digits as its factorization.

55085971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63000, while the sum is 40.

The square root of 55085971 is about 7421.9923874927. The cubic root of 55085971 is about 380.4932905757.

The spelling of 55085971 in words is "fifty-five million, eighty-five thousand, nine hundred seventy-one".