51254431 has 4 divisors (see below), whose sum is σ = 51520192. Its totient is φ = 50988672.

The previous prime is 51254429. The next prime is 51254449. The reversal of 51254431 is 13445215.

It is a happy number.

51254431 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.

It is a cyclic number.

It is not a de Polignac number, because 51254431 - 2¹ = 51254429 is a prime.

It is a super-2 number, since 2×51254431² = 5254033394267522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51254396 and 51254405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51254461) 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, 132591 + ... + 132976.

It is an arithmetic number, because the mean of its divisors is an integer number (12880048).

Almost surely, 2^51254431 is an apocalyptic number.

51254431 is a deficient number, since it is larger than the sum of its proper divisors (265761).

51254431 is a wasteful number, since it uses less digits than its factorization.

51254431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265760.

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

The square root of 51254431 is about 7159.2199994133. The cubic root of 51254431 is about 371.4586467123.

Adding to 51254431 its reverse (13445215), we get a palindrome (64699646).

The spelling of 51254431 in words is "fifty-one million, two hundred fifty-four thousand, four hundred thirty-one".