55551065 has 4 divisors (see below), whose sum is σ = 66661284. Its totient is φ = 44440848.

The previous prime is 55551061. The next prime is 55551071. The reversal of 55551065 is 56015555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56015555 = 5 ⋅11203111.

It can be written as a sum of positive squares in 2 ways, for example, as 40589641 + 14961424 = 6371^2 + 3868^2 .

It is a cyclic number.

It is not a de Polignac number, because 55551065 - 2² = 55551061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55551061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555102 + ... + 5555111.

It is an arithmetic number, because the mean of its divisors is an integer number (16665321).

Almost surely, 2^55551065 is an apocalyptic number.

It is an amenable number.

55551065 is a deficient number, since it is larger than the sum of its proper divisors (11110219).

55551065 is a wasteful number, since it uses less digits than its factorization.

55551065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110218.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 55551065 is about 7453.2586832875. The cubic root of 55551065 is about 381.5611331016.

The spelling of 55551065 in words is "fifty-five million, five hundred fifty-one thousand, sixty-five".