55000001 has 6 divisors (see below), whose sum is σ = 63979650. Its totient is φ = 47142816.

The previous prime is 54999943. The next prime is 55000013. The reversal of 55000001 is 10000055.

It can be written as a sum of positive squares in only one way, i.e., 51480625 + 3519376 = 7175^2 + 1876^2 .

It is not a de Polignac number, because 55000001 - 2¹⁸ = 54737857 is a prime.

It is a super-2 number, since 2×55000001² = 6050000220000002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55000031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561176 + ... + 561273.

It is an arithmetic number, because the mean of its divisors is an integer number (10663275).

Almost surely, 2^55000001 is an apocalyptic number.

It is an amenable number.

55000001 is a deficient number, since it is larger than the sum of its proper divisors (8979649).

55000001 is a wasteful number, since it uses less digits than its factorization.

55000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122463 (or 1122456 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 11.

The square root of 55000001 is about 7416.1985545156. The cubic root of 55000001 is about 380.2952483810.

Adding to 55000001 its reverse (10000055), we get a palindrome (65000056).

The spelling of 55000001 in words is "fifty-five million, one", and thus it is an aban number and an uban number.