55631305 has 8 divisors (see below), whose sum is σ = 67419144. Its totient is φ = 44064000.

The previous prime is 55631299. The next prime is 55631321. The reversal of 55631305 is 50313655.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3748096 + 51883209 = 1936^2 + 7203^2 .

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

It is not a de Polignac number, because 55631305 - 2⁹ = 55630793 is a prime.

It is a Duffinian 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, 54576 + ... + 55585.

It is an arithmetic number, because the mean of its divisors is an integer number (8427393).

Almost surely, 2^55631305 is an apocalyptic number.

It is an amenable number.

55631305 is a deficient number, since it is larger than the sum of its proper divisors (11787839).

55631305 is a wasteful number, since it uses less digits than its factorization.

55631305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110267.

The product of its (nonzero) digits is 6750, while the sum is 28.

The square root of 55631305 is about 7458.6396212714. The cubic root of 55631305 is about 381.7447583598.

The spelling of 55631305 in words is "fifty-five million, six hundred thirty-one thousand, three hundred five".