55723642 has 8 divisors (see below), whose sum is σ = 90015156. Its totient is φ = 25718592.

The previous prime is 55723639. The next prime is 55723643. The reversal of 55723642 is 24632755.

55723642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 55666521 + 57121 = 7461^2 + 239^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 55723598 and 55723607.

It is not an unprimeable number, because it can be changed into a prime (55723643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1071583 + ... + 1071634.

Almost surely, 2^55723642 is an apocalyptic number.

55723642 is a deficient number, since it is larger than the sum of its proper divisors (34291514).

55723642 is a wasteful number, since it uses less digits than its factorization.

55723642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143232.

The product of its digits is 50400, while the sum is 34.

The square root of 55723642 is about 7464.8269906274. The cubic root of 55723642 is about 381.9558486293.

It can be divided in two parts, 55723 and 642, that added together give a palindrome (56365).

The spelling of 55723642 in words is "fifty-five million, seven hundred twenty-three thousand, six hundred forty-two".