55225730 has 32 divisors (see below), whose sum is σ = 114117120. Its totient is φ = 18849600.

The previous prime is 55225697. The next prime is 55225733. The reversal of 55225730 is 3752255.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55225693 and 55225702.

It is not an unprimeable number, because it can be changed into a prime (55225733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15080 + ... + 18380.

It is an arithmetic number, because the mean of its divisors is an integer number (3566160).

Almost surely, 2^55225730 is an apocalyptic number.

55225730 is an abundant number, since it is smaller than the sum of its proper divisors (58891390).

55225730 is a wasteful number, since it uses less digits than its factorization.

55225730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554.

The product of its (nonzero) digits is 10500, while the sum is 29.

The square root of 55225730 is about 7431.4016174609. The cubic root of 55225730 is about 380.8148028827.

Adding to 55225730 its reverse (3752255), we get a palindrome (58977985).

It can be divided in two parts, 55225 and 730, that added together give a palindrome (55955).

The spelling of 55225730 in words is "fifty-five million, two hundred twenty-five thousand, seven hundred thirty".