55017409 has 4 divisors (see below), whose sum is σ = 56504404. Its totient is φ = 53530416.

The previous prime is 55017383. The next prime is 55017433. The reversal of 55017409 is 90471055.

55017409 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90471055 = 5 ⋅18094211.

It can be written as a sum of positive squares in 2 ways, for example, as 30217009 + 24800400 = 5497^2 + 4980^2 .

It is not a de Polignac number, because 55017409 - 2⁵ = 55017377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55017439) 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, 743442 + ... + 743515.

It is an arithmetic number, because the mean of its divisors is an integer number (14126101).

Almost surely, 2^55017409 is an apocalyptic number.

It is an amenable number.

55017409 is a deficient number, since it is larger than the sum of its proper divisors (1486995).

55017409 is a wasteful number, since it uses less digits than its factorization.

55017409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486994.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 55017409 is about 7417.3721087728. The cubic root of 55017409 is about 380.3353664491.

The spelling of 55017409 in words is "fifty-five million, seventeen thousand, four hundred nine".