55220297 has 8 divisors (see below), whose sum is σ = 60330720. Its totient is φ = 50124960.

The previous prime is 55220293. The next prime is 55220353. The reversal of 55220297 is 79202255.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55220297 - 2² = 55220293 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55220293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4733 + ... + 11525.

It is an arithmetic number, because the mean of its divisors is an integer number (7541340).

Almost surely, 2^55220297 is an apocalyptic number.

It is an amenable number.

55220297 is a deficient number, since it is larger than the sum of its proper divisors (5110423).

55220297 is a wasteful number, since it uses less digits than its factorization.

55220297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7543.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 55220297 is about 7431.0360650450. The cubic root of 55220297 is about 380.8023145331.

The spelling of 55220297 in words is "fifty-five million, two hundred twenty thousand, two hundred ninety-seven".