55145913 has 16 divisors (see below), whose sum is σ = 75427200. Its totient is φ = 35826560.

The previous prime is 55145911. The next prime is 55145933. The reversal of 55145913 is 31954155.

It is a cyclic number.

It is not a de Polignac number, because 55145913 - 2¹ = 55145911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55145911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17503 + ... + 20411.

It is an arithmetic number, because the mean of its divisors is an integer number (4714200).

Almost surely, 2^55145913 is an apocalyptic number.

It is an amenable number.

55145913 is a deficient number, since it is larger than the sum of its proper divisors (20281287).

55145913 is a wasteful number, since it uses less digits than its factorization.

55145913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3072.

The product of its digits is 13500, while the sum is 33.

The square root of 55145913 is about 7426.0294235884. The cubic root of 55145913 is about 380.6312522667.

It can be divided in two parts, 551 and 45913, that added together give a palindrome (46464).

The spelling of 55145913 in words is "fifty-five million, one hundred forty-five thousand, nine hundred thirteen".