55731722 has 4 divisors (see below), whose sum is σ = 83597586. Its totient is φ = 27865860.

The previous prime is 55731721. The next prime is 55731733. The reversal of 55731722 is 22713755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22713755 = 5 ⋅4542751.

It can be written as a sum of positive squares in only one way, i.e., 50537881 + 5193841 = 7109^2 + 2279^2 .

It is not an unprimeable number, because it can be changed into a prime (55731721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13932929 + ... + 13932932.

Almost surely, 2^55731722 is an apocalyptic number.

55731722 is a deficient number, since it is larger than the sum of its proper divisors (27865864).

55731722 is a wasteful number, since it uses less digits than its factorization.

55731722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27865863.

The product of its digits is 14700, while the sum is 32.

The square root of 55731722 is about 7465.3681757834. The cubic root of 55731722 is about 381.9743091007.

The spelling of 55731722 in words is "fifty-five million, seven hundred thirty-one thousand, seven hundred twenty-two".