55955521 has 8 divisors (see below), whose sum is σ = 57496320. Its totient is φ = 54429408.

The previous prime is 55955509. The next prime is 55955533. The reversal of 55955521 is 12555955.

It is an interprime number because it is at equal distance from previous prime (55955509) and next prime (55955533).

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 55955521 - 2⁵ = 55955489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55955561) 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, 4285 + ... + 11413.

It is an arithmetic number, because the mean of its divisors is an integer number (7187040).

Almost surely, 2^55955521 is an apocalyptic number.

It is an amenable number.

55955521 is a deficient number, since it is larger than the sum of its proper divisors (1540799).

55955521 is a wasteful number, since it uses less digits than its factorization.

55955521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7343.

The product of its digits is 56250, while the sum is 37.

The square root of 55955521 is about 7480.3423050018. The cubic root of 55955521 is about 382.4849177416.

The spelling of 55955521 in words is "fifty-five million, nine hundred fifty-five thousand, five hundred twenty-one".