51135743 has 4 divisors (see below), whose sum is σ = 51161568. Its totient is φ = 51109920.

The previous prime is 51135731. The next prime is 51135761. The reversal of 51135743 is 34753115.

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 51135743 - 2⁴ = 51135727 is a prime.

It is a super-2 number, since 2×51135743² = 5229728424324098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51135703) 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, 9671 + ... + 13992.

It is an arithmetic number, because the mean of its divisors is an integer number (12790392).

Almost surely, 2^51135743 is an apocalyptic number.

51135743 is a deficient number, since it is larger than the sum of its proper divisors (25825).

51135743 is a wasteful number, since it uses less digits than its factorization.

51135743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25824.

The product of its digits is 6300, while the sum is 29.

The square root of 51135743 is about 7150.9260239496. The cubic root of 51135743 is about 371.1717007346.

Adding to 51135743 its reverse (34753115), we get a palindrome (85888858).

The spelling of 51135743 in words is "fifty-one million, one hundred thirty-five thousand, seven hundred forty-three".