51454231 has 4 divisors (see below), whose sum is σ = 51592552. Its totient is φ = 51315912.

The previous prime is 51454229. The next prime is 51454253. The reversal of 51454231 is 13245415.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13245415 = 5 ⋅2649083.

It is a cyclic number.

It is not a de Polignac number, because 51454231 - 2¹ = 51454229 is a prime.

It is a super-2 number, since 2×51454231² = 5295075775602722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51454196 and 51454205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51452231) 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, 68601 + ... + 69346.

It is an arithmetic number, because the mean of its divisors is an integer number (12898138).

Almost surely, 2^51454231 is an apocalyptic number.

51454231 is a deficient number, since it is larger than the sum of its proper divisors (138321).

51454231 is a wasteful number, since it uses less digits than its factorization.

51454231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138320.

The product of its digits is 2400, while the sum is 25.

The square root of 51454231 is about 7173.1604610520. The cubic root of 51454231 is about 371.9406941916.

Adding to 51454231 its reverse (13245415), we get a palindrome (64699646).

It can be divided in two parts, 514 and 54231, that added together give a palindrome (54745).

The spelling of 51454231 in words is "fifty-one million, four hundred fifty-four thousand, two hundred thirty-one".