55211755 has 8 divisors (see below), whose sum is σ = 66379824. Its totient is φ = 44085600.

The previous prime is 55211731. The next prime is 55211809. The reversal of 55211755 is 55711255.

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

It is not a de Polignac number, because 55211755 - 2⁹ = 55211243 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, 7501 + ... + 12910.

It is an arithmetic number, because the mean of its divisors is an integer number (8297478).

Almost surely, 2^55211755 is an apocalyptic number.

55211755 is a deficient number, since it is larger than the sum of its proper divisors (11168069).

55211755 is a wasteful number, since it uses less digits than its factorization.

55211755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20957.

The product of its digits is 8750, while the sum is 31.

The square root of 55211755 is about 7430.4612911985. The cubic root of 55211755 is about 380.7826781476.

Subtracting 55211755 from its reverse (55711255), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 55211755 in words is "fifty-five million, two hundred eleven thousand, seven hundred fifty-five".