55294221 has 8 divisors (see below), whose sum is σ = 73760544. Its totient is φ = 36845360.

The previous prime is 55294219. The next prime is 55294223. The reversal of 55294221 is 12249255.

It is an interprime number because it is at equal distance from previous prime (55294219) and next prime (55294223).

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 55294221 - 2¹ = 55294219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55294223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8170 + ... + 13316.

It is an arithmetic number, because the mean of its divisors is an integer number (9220068).

Almost surely, 2^55294221 is an apocalyptic number.

It is an amenable number.

55294221 is a deficient number, since it is larger than the sum of its proper divisors (18466323).

55294221 is a wasteful number, since it uses less digits than its factorization.

55294221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8731.

The product of its digits is 7200, while the sum is 30.

The square root of 55294221 is about 7436.0084050517. The cubic root of 55294221 is about 380.9721668000.

The spelling of 55294221 in words is "fifty-five million, two hundred ninety-four thousand, two hundred twenty-one".