55203857 has 8 divisors (see below), whose sum is σ = 56140800. Its totient is φ = 54273024.

The previous prime is 55203853. The next prime is 55203859. The reversal of 55203857 is 75830255.

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 55203857 - 2² = 55203853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55203853) 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, 18944 + ... + 21662.

It is an arithmetic number, because the mean of its divisors is an integer number (7017600).

Almost surely, 2^55203857 is an apocalyptic number.

It is an amenable number.

55203857 is a deficient number, since it is larger than the sum of its proper divisors (936943).

55203857 is a wasteful number, since it uses less digits than its factorization.

55203857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3055.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 55203857 is about 7429.9298112432. The cubic root of 55203857 is about 380.7645203899.

The spelling of 55203857 in words is "fifty-five million, two hundred three thousand, eight hundred fifty-seven".