55212305 has 8 divisors (see below), whose sum is σ = 69135552. Its totient is φ = 42249328.

The previous prime is 55212299. The next prime is 55212331. The reversal of 55212305 is 50321255.

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 55212305 - 2¹⁰ = 55211281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 239939 + ... + 240168.

It is an arithmetic number, because the mean of its divisors is an integer number (8641944).

Almost surely, 2^55212305 is an apocalyptic number.

It is an amenable number.

55212305 is a deficient number, since it is larger than the sum of its proper divisors (13923247).

55212305 is a wasteful number, since it uses less digits than its factorization.

55212305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480135.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 55212305 is about 7430.4983009217. The cubic root of 55212305 is about 380.7839425509.

The spelling of 55212305 in words is "fifty-five million, two hundred twelve thousand, three hundred five".