55561263 has 16 divisors (see below), whose sum is σ = 79084800. Its totient is φ = 34594560.

The previous prime is 55561243. The next prime is 55561271. The reversal of 55561263 is 36216555.

It is a de Polignac number, because none of the positive numbers 2^k-55561263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55561213) 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, 2818 + ... + 10911.

It is an arithmetic number, because the mean of its divisors is an integer number (4942800).

Almost surely, 2^55561263 is an apocalyptic number.

55561263 is a deficient number, since it is larger than the sum of its proper divisors (23523537).

55561263 is a wasteful number, since it uses less digits than its factorization.

55561263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13822.

The product of its digits is 27000, while the sum is 33.

The square root of 55561263 is about 7453.9427821791. The cubic root of 55561263 is about 381.5844805229.

The spelling of 55561263 in words is "fifty-five million, five hundred sixty-one thousand, two hundred sixty-three".