54855791 has 4 divisors (see below), whose sum is σ = 56747400. Its totient is φ = 52964184.

The previous prime is 54855767. The next prime is 54855809. The reversal of 54855791 is 19755845.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19755845 = 5 ⋅3951169.

It is a cyclic number.

It is not a de Polignac number, because 54855791 - 2⁶ = 54855727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54855701) 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, 945761 + ... + 945818.

It is an arithmetic number, because the mean of its divisors is an integer number (14186850).

Almost surely, 2^54855791 is an apocalyptic number.

54855791 is a deficient number, since it is larger than the sum of its proper divisors (1891609).

54855791 is a wasteful number, since it uses less digits than its factorization.

54855791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891608.

The product of its digits is 252000, while the sum is 44.

The square root of 54855791 is about 7406.4695368306. The cubic root of 54855791 is about 379.9625794176.

The spelling of 54855791 in words is "fifty-four million, eight hundred fifty-five thousand, seven hundred ninety-one".