55040513 has 8 divisors (see below), whose sum is σ = 60109536. Its totient is φ = 49982400.

The previous prime is 55040507. The next prime is 55040527. The reversal of 55040513 is 31504055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55040513 - 2²⁰ = 53991937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55040533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10745 + ... + 15017.

It is an arithmetic number, because the mean of its divisors is an integer number (7513692).

Almost surely, 2^55040513 is an apocalyptic number.

It is an amenable number.

55040513 is a deficient number, since it is larger than the sum of its proper divisors (5069023).

55040513 is a wasteful number, since it uses less digits than its factorization.

55040513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5455.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 55040513 is about 7418.9293701989. The cubic root of 55040513 is about 380.3885983182.

Adding to 55040513 its reverse (31504055), we get a palindrome (86544568).

The spelling of 55040513 in words is "fifty-five million, forty thousand, five hundred thirteen".