55731730 has 16 divisors (see below), whose sum is σ = 100759320. Its totient is φ = 22194432.

The previous prime is 55731721. The next prime is 55731733. The reversal of 55731730 is 3713755.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 53890281 + 1841449 = 7341^2 + 1357^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55731692 and 55731701.

It is not an unprimeable number, because it can be changed into a prime (55731733) 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 in 7 ways as a sum of consecutive naturals, for example, 9879 + ... + 14458.

Almost surely, 2^55731730 is an apocalyptic number.

55731730 is a deficient number, since it is larger than the sum of its proper divisors (45027590).

55731730 is a wasteful number, since it uses less digits than its factorization.

55731730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24573.

The product of its (nonzero) digits is 11025, while the sum is 31.

The square root of 55731730 is about 7465.3687115909. The cubic root of 55731730 is about 381.9743273775.

The spelling of 55731730 in words is "fifty-five million, seven hundred thirty-one thousand, seven hundred thirty".