55297211 has 4 divisors (see below), whose sum is σ = 57081024. Its totient is φ = 53513400.

The previous prime is 55297199. The next prime is 55297241. The reversal of 55297211 is 11279255.

It is a happy number.

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 55297211 - 2²² = 51102907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55297241) 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, 891860 + ... + 891921.

It is an arithmetic number, because the mean of its divisors is an integer number (14270256).

Almost surely, 2^55297211 is an apocalyptic number.

55297211 is a deficient number, since it is larger than the sum of its proper divisors (1783813).

55297211 is a wasteful number, since it uses less digits than its factorization.

55297211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783812.

The product of its digits is 6300, while the sum is 32.

The square root of 55297211 is about 7436.2094510577. The cubic root of 55297211 is about 380.9790336191.

The spelling of 55297211 in words is "fifty-five million, two hundred ninety-seven thousand, two hundred eleven".