51232451 has 4 divisors (see below), whose sum is σ = 51254304. Its totient is φ = 51210600.

The previous prime is 51232439. The next prime is 51232459. The reversal of 51232451 is 15423215.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51232451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51232459) 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, 6920 + ... + 12261.

It is an arithmetic number, because the mean of its divisors is an integer number (12813576).

Almost surely, 2^51232451 is an apocalyptic number.

51232451 is a deficient number, since it is larger than the sum of its proper divisors (21853).

51232451 is a wasteful number, since it uses less digits than its factorization.

51232451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21852.

The product of its digits is 1200, while the sum is 23.

The square root of 51232451 is about 7157.6847513704. The cubic root of 51232451 is about 371.4055402245.

Adding to 51232451 its reverse (15423215), we get a palindrome (66655666).

The spelling of 51232451 in words is "fifty-one million, two hundred thirty-two thousand, four hundred fifty-one".