55196857 has 4 divisors (see below), whose sum is σ = 55294096. Its totient is φ = 55099620.

The previous prime is 55196819. The next prime is 55196863. The reversal of 55196857 is 75869155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75869155 = 5 ⋅15173831.

It is a cyclic number.

It is not a de Polignac number, because 55196857 - 2¹¹ = 55194809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55196257) 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, 47763 + ... + 48904.

It is an arithmetic number, because the mean of its divisors is an integer number (13823524).

Almost surely, 2^55196857 is an apocalyptic number.

It is an amenable number.

55196857 is a deficient number, since it is larger than the sum of its proper divisors (97239).

55196857 is an equidigital number, since it uses as much as digits as its factorization.

55196857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97238.

The product of its digits is 378000, while the sum is 46.

The square root of 55196857 is about 7429.4587286020. The cubic root of 55196857 is about 380.7484257156.

The spelling of 55196857 in words is "fifty-five million, one hundred ninety-six thousand, eight hundred fifty-seven".