55013857 has 8 divisors (see below), whose sum is σ = 56918376. Its totient is φ = 53131392.

The previous prime is 55013851. The next prime is 55013869. The reversal of 55013857 is 75831055.

It can be written as a sum of positive squares in 4 ways, for example, as 21939856 + 33074001 = 4684^2 + 5751^2 .

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 55013857 - 2¹⁵ = 54981089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55013851) 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, 358 + ... + 10495.

It is an arithmetic number, because the mean of its divisors is an integer number (7114797).

Almost surely, 2^55013857 is an apocalyptic number.

It is an amenable number.

55013857 is a deficient number, since it is larger than the sum of its proper divisors (1904519).

55013857 is a wasteful number, since it uses less digits than its factorization.

55013857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11027.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 55013857 is about 7417.1326670082. The cubic root of 55013857 is about 380.3271812805.

The spelling of 55013857 in words is "fifty-five million, thirteen thousand, eight hundred fifty-seven".