55262217 has 4 divisors (see below), whose sum is σ = 73682960. Its totient is φ = 36841476.

The previous prime is 55262209. The next prime is 55262231. The reversal of 55262217 is 71226255.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55262217 - 2³ = 55262209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55262287) 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, 9210367 + ... + 9210372.

It is an arithmetic number, because the mean of its divisors is an integer number (18420740).

Almost surely, 2^55262217 is an apocalyptic number.

It is an amenable number.

55262217 is a deficient number, since it is larger than the sum of its proper divisors (18420743).

55262217 is a wasteful number, since it uses less digits than its factorization.

55262217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18420742.

The product of its digits is 8400, while the sum is 30.

The square root of 55262217 is about 7433.8561325869. The cubic root of 55262217 is about 380.8986510624.

The spelling of 55262217 in words is "fifty-five million, two hundred sixty-two thousand, two hundred seventeen".