51135451 has 4 divisors (see below), whose sum is σ = 51150904. Its totient is φ = 51120000.

The previous prime is 51135449. The next prime is 51135481. The reversal of 51135451 is 15453115.

It is a happy number.

51135451 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 51135451 - 2¹ = 51135449 is a prime.

It is a super-2 number, since 2×51135451² = 5229668697946802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51135421) 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, 525 + ... + 10126.

It is an arithmetic number, because the mean of its divisors is an integer number (12787726).

Almost surely, 2^51135451 is an apocalyptic number.

51135451 is a deficient number, since it is larger than the sum of its proper divisors (15453).

51135451 is a wasteful number, since it uses less digits than its factorization.

51135451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15452.

The product of its digits is 1500, while the sum is 25.

The square root of 51135451 is about 7150.9056069843. The cubic root of 51135451 is about 371.1709942337.

Adding to 51135451 its reverse (15453115), we get a palindrome (66588566).

The spelling of 51135451 in words is "fifty-one million, one hundred thirty-five thousand, four hundred fifty-one".