55809701 has 4 divisors (see below), whose sum is σ = 55829004. Its totient is φ = 55790400.

The previous prime is 55809697. The next prime is 55809709. The reversal of 55809701 is 10790855.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10790855 = 5 ⋅2158171.

It can be written as a sum of positive squares in 2 ways, for example, as 29441476 + 26368225 = 5426^2 + 5135^2 .

It is a cyclic number.

It is not a de Polignac number, because 55809701 - 2² = 55809697 is a prime.

It is a super-2 number, since 2×55809701² = 6229445451418802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55809709) 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, 4340 + ... + 11421.

It is an arithmetic number, because the mean of its divisors is an integer number (13957251).

Almost surely, 2^55809701 is an apocalyptic number.

It is an amenable number.

55809701 is a deficient number, since it is larger than the sum of its proper divisors (19303).

55809701 is a wasteful number, since it uses less digits than its factorization.

55809701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19302.

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 55809701 is about 7470.5890664659. The cubic root of 55809701 is about 382.1523770085.

The spelling of 55809701 in words is "fifty-five million, eight hundred nine thousand, seven hundred one".