51853823 has 4 divisors (see below), whose sum is σ = 59261520. Its totient is φ = 44446128.

The previous prime is 51853787. The next prime is 51853849. The reversal of 51853823 is 32835815.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32835815 = 5 ⋅6567163.

It is a cyclic number.

It is not a de Polignac number, because 51853823 - 2⁶ = 51853759 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 (51859823) 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, 3703838 + ... + 3703851.

It is an arithmetic number, because the mean of its divisors is an integer number (14815380).

Almost surely, 2^51853823 is an apocalyptic number.

51853823 is a deficient number, since it is larger than the sum of its proper divisors (7407697).

51853823 is an equidigital number, since it uses as much as digits as its factorization.

51853823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7407696.

The product of its digits is 28800, while the sum is 35.

The square root of 51853823 is about 7200.9598665733. The cubic root of 51853823 is about 372.9010391850.

The spelling of 51853823 in words is "fifty-one million, eight hundred fifty-three thousand, eight hundred twenty-three".