55564271 has 4 divisors (see below), whose sum is σ = 63502032. Its totient is φ = 47626512.

The previous prime is 55564231. The next prime is 55564283. The reversal of 55564271 is 17246555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55564271 - 2⁶ = 55564207 is a prime.

It is a super-2 number, since 2×55564271² = 6174776423522882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55564231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3968870 + ... + 3968883.

It is an arithmetic number, because the mean of its divisors is an integer number (15875508).

Almost surely, 2^55564271 is an apocalyptic number.

55564271 is a deficient number, since it is larger than the sum of its proper divisors (7937761).

55564271 is an equidigital number, since it uses as much as digits as its factorization.

55564271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7937760.

The product of its digits is 42000, while the sum is 35.

The square root of 55564271 is about 7454.1445518584. The cubic root of 55564271 is about 381.5913665279.

The spelling of 55564271 in words is "fifty-five million, five hundred sixty-four thousand, two hundred seventy-one".