55250857 has 4 divisors (see below), whose sum is σ = 56293380. Its totient is φ = 54208336.

The previous prime is 55250849. The next prime is 55250869. The reversal of 55250857 is 75805255.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29637136 + 25613721 = 5444^2 + 5061^2 .

It is a cyclic number.

It is not a de Polignac number, because 55250857 - 2³ = 55250849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55250827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521182 + ... + 521287.

It is an arithmetic number, because the mean of its divisors is an integer number (14073345).

Almost surely, 2^55250857 is an apocalyptic number.

It is an amenable number.

55250857 is a deficient number, since it is larger than the sum of its proper divisors (1042523).

55250857 is a wasteful number, since it uses less digits than its factorization.

55250857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042522.

The product of its (nonzero) digits is 70000, while the sum is 37.

The square root of 55250857 is about 7433.0920214942. The cubic root of 55250857 is about 380.8725494120.

The spelling of 55250857 in words is "fifty-five million, two hundred fifty thousand, eight hundred fifty-seven".