55636319 has 4 divisors (see below), whose sum is σ = 55678560. Its totient is φ = 55594080.

The previous prime is 55636309. The next prime is 55636349. The reversal of 55636319 is 91363655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91363655 = 5 ⋅18272731.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55636319 is a prime.

It is a super-2 number, since 2×55636319² = 6190799983739522, 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 (55636309) 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, 19079 + ... + 21800.

It is an arithmetic number, because the mean of its divisors is an integer number (13919640).

Almost surely, 2^55636319 is an apocalyptic number.

55636319 is a deficient number, since it is larger than the sum of its proper divisors (42241).

55636319 is a wasteful number, since it uses less digits than its factorization.

55636319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42240.

The product of its digits is 72900, while the sum is 38.

The square root of 55636319 is about 7458.9757339731. The cubic root of 55636319 is about 381.7562267870.

It can be divided in two parts, 55636 and 319, that added together give a palindrome (55955).

The spelling of 55636319 in words is "fifty-five million, six hundred thirty-six thousand, three hundred nineteen".