51861153 has 4 divisors (see below), whose sum is σ = 69148208. Its totient is φ = 34574100.

The previous prime is 51861119. The next prime is 51861157. The reversal of 51861153 is 35116815.

51861153 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a de Polignac number, because none of the positive numbers 2^k-51861153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51861153.

It is not an unprimeable number, because it can be changed into a prime (51861157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8643523 + ... + 8643528.

It is an arithmetic number, because the mean of its divisors is an integer number (17287052).

Almost surely, 2^51861153 is an apocalyptic number.

It is an amenable number.

51861153 is a deficient number, since it is larger than the sum of its proper divisors (17287055).

51861153 is a wasteful number, since it uses less digits than its factorization.

51861153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17287054.

The product of its digits is 3600, while the sum is 30.

The square root of 51861153 is about 7201.4688085140. The cubic root of 51861153 is about 372.9186093189.

Adding to 51861153 its reverse (35116815), we get a palindrome (86977968).

The spelling of 51861153 in words is "fifty-one million, eight hundred sixty-one thousand, one hundred fifty-three".