55811671 has 4 divisors (see below), whose sum is σ = 55859344. Its totient is φ = 55764000.

The previous prime is 55811669. The next prime is 55811711. The reversal of 55811671 is 17611855.

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 55811671 - 2¹ = 55811669 is a prime.

It is a super-2 number, since 2×55811671² = 6229885239624482, 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 (55811621) 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, 22035 + ... + 24436.

It is an arithmetic number, because the mean of its divisors is an integer number (13964836).

Almost surely, 2^55811671 is an apocalyptic number.

55811671 is a deficient number, since it is larger than the sum of its proper divisors (47673).

55811671 is a wasteful number, since it uses less digits than its factorization.

55811671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47672.

The product of its digits is 8400, while the sum is 34.

The square root of 55811671 is about 7470.7209156814. The cubic root of 55811671 is about 382.1568734271.

The spelling of 55811671 in words is "fifty-five million, eight hundred eleven thousand, six hundred seventy-one".