51854153 has 4 divisors (see below), whose sum is σ = 55842948. Its totient is φ = 47865360.

The previous prime is 51854141. The next prime is 51854191. The reversal of 51854153 is 35145815.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16949689 + 34904464 = 4117^2 + 5908^2 .

It is a cyclic number.

It is not a de Polignac number, because 51854153 - 2⁴ = 51854137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51854653) 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, 1994378 + ... + 1994403.

It is an arithmetic number, because the mean of its divisors is an integer number (13960737).

Almost surely, 2^51854153 is an apocalyptic number.

It is an amenable number.

51854153 is a deficient number, since it is larger than the sum of its proper divisors (3988795).

51854153 is a wasteful number, since it uses less digits than its factorization.

51854153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988794.

The product of its digits is 12000, while the sum is 32.

The square root of 51854153 is about 7200.9827801488. The cubic root of 51854153 is about 372.9018302362.

Adding to 51854153 its reverse (35145815), we get a palindrome (86999968).

The spelling of 51854153 in words is "fifty-one million, eight hundred fifty-four thousand, one hundred fifty-three".