55071001 has 2 divisors, whose sum is σ = 55071002. Its totient is φ = 55071000.

The previous prime is 55070999. The next prime is 55071031. The reversal of 55071001 is 10017055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53275401 + 1795600 = 7299^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 55071001 - 2¹ = 55070999 is a prime.

It is a super-2 number, since 2×55071001² = 6065630302284002, which contains 22 as substring.

Together with 55070999, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 55071001.

It is not a weakly prime, because it can be changed into another prime (55071031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27535500 + 27535501.

It is an arithmetic number, because the mean of its divisors is an integer number (27535501).

Almost surely, 2^55071001 is an apocalyptic number.

It is an amenable number.

55071001 is a deficient number, since it is larger than the sum of its proper divisors (1).

55071001 is an equidigital number, since it uses as much as digits as its factorization.

55071001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 175, while the sum is 19.

The square root of 55071001 is about 7420.9838296549. The cubic root of 55071001 is about 380.4588202105.

Adding to 55071001 its reverse (10017055), we get a palindrome (65088056).

The spelling of 55071001 in words is "fifty-five million, seventy-one thousand, one".