55310645 has 8 divisors (see below), whose sum is σ = 71478456. Its totient is φ = 40844736.

The previous prime is 55310621. The next prime is 55310663. The reversal of 55310645 is 54601355.

It can be written as a sum of positive squares in 4 ways, for example, as 1976836 + 53333809 = 1406^2 + 7303^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 55310645 - 2⁶ = 55310581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425402 + ... + 425531.

It is an arithmetic number, because the mean of its divisors is an integer number (8934807).

Almost surely, 2^55310645 is an apocalyptic number.

It is an amenable number.

55310645 is a deficient number, since it is larger than the sum of its proper divisors (16167811).

55310645 is a wasteful number, since it uses less digits than its factorization.

55310645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850951.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 55310645 is about 7437.1126789904. The cubic root of 55310645 is about 381.0098830227.

It can be divided in two parts, 55310 and 645, that added together give a palindrome (55955).

The spelling of 55310645 in words is "fifty-five million, three hundred ten thousand, six hundred forty-five".