55165109 has 4 divisors (see below), whose sum is σ = 57563616. Its totient is φ = 52766604.

The previous prime is 55165091. The next prime is 55165127. The reversal of 55165109 is 90156155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (55165091) and next prime (55165127).

It is a cyclic number.

It is not a de Polignac number, because 55165109 - 2¹² = 55161013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55165139) 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, 1199219 + ... + 1199264.

It is an arithmetic number, because the mean of its divisors is an integer number (14390904).

Almost surely, 2^55165109 is an apocalyptic number.

It is an amenable number.

55165109 is a deficient number, since it is larger than the sum of its proper divisors (2398507).

55165109 is a wasteful number, since it uses less digits than its factorization.

55165109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398506.

The product of its (nonzero) digits is 6750, while the sum is 32.

The square root of 55165109 is about 7427.3217918709. The cubic root of 55165109 is about 380.6754123835.

The spelling of 55165109 in words is "fifty-five million, one hundred sixty-five thousand, one hundred nine".