55200257 has 8 divisors (see below), whose sum is σ = 63239232. Its totient is φ = 47199600.

The previous prime is 55200239. The next prime is 55200269. The reversal of 55200257 is 75200255.

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

It is not a de Polignac number, because 55200257 - 2⁶ = 55200193 is a prime.

It is a super-3 number, since 3×55200257³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (55200287) 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, 6419 + ... + 12312.

It is an arithmetic number, because the mean of its divisors is an integer number (7904904).

Almost surely, 2^55200257 is an apocalyptic number.

It is an amenable number.

55200257 is a deficient number, since it is larger than the sum of its proper divisors (8038975).

55200257 is a wasteful number, since it uses less digits than its factorization.

55200257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19159.

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 55200257 is about 7429.6875439012. The cubic root of 55200257 is about 380.7562432988.

The spelling of 55200257 in words is "fifty-five million, two hundred thousand, two hundred fifty-seven".