55750321 has 8 divisors (see below), whose sum is σ = 63463104. Its totient is φ = 48478320.

The previous prime is 55750301. The next prime is 55750393. The reversal of 55750321 is 12305755.

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

It is not a de Polignac number, because 55750321 - 2¹³ = 55742129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55750321.

It is not an unprimeable number, because it can be changed into a prime (55750301) 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, 109926 + ... + 110431.

It is an arithmetic number, because the mean of its divisors is an integer number (7932888).

Almost surely, 2^55750321 is an apocalyptic number.

It is an amenable number.

55750321 is a deficient number, since it is larger than the sum of its proper divisors (7712783).

55750321 is a wasteful number, since it uses less digits than its factorization.

55750321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220391.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 55750321 is about 7466.6137572530. The cubic root of 55750321 is about 382.0167956761.

The spelling of 55750321 in words is "fifty-five million, seven hundred fifty thousand, three hundred twenty-one".