55840501 has 4 divisors (see below), whose sum is σ = 56016972. Its totient is φ = 55664032.

The previous prime is 55840489. The next prime is 55840507. The reversal of 55840501 is 10504855.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2477476 + 53363025 = 1574^2 + 7305^2 .

It is a cyclic number.

It is not a de Polignac number, because 55840501 - 2²³ = 47451893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55840501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55840507) 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, 87760 + ... + 88393.

It is an arithmetic number, because the mean of its divisors is an integer number (14004243).

Almost surely, 2^55840501 is an apocalyptic number.

It is an amenable number.

55840501 is a deficient number, since it is larger than the sum of its proper divisors (176471).

55840501 is a wasteful number, since it uses less digits than its factorization.

55840501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176470.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 55840501 is about 7472.6501992265. The cubic root of 55840501 is about 382.2226642430. Note that the first 3 decimals are identical.

The spelling of 55840501 in words is "fifty-five million, eight hundred forty thousand, five hundred one".