51343657 has 4 divisors (see below), whose sum is σ = 52999936. Its totient is φ = 49687380.

The previous prime is 51343651. The next prime is 51343711. The reversal of 51343657 is 75634315.

51343657 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75634315 = 5 ⋅15126863.

It is a cyclic number.

It is not a de Polignac number, because 51343657 - 2¹⁹ = 50819369 is a prime.

It is a super-2 number, since 2×51343657² = 5272342228267298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51343651) 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, 828093 + ... + 828154.

It is an arithmetic number, because the mean of its divisors is an integer number (13249984).

Almost surely, 2^51343657 is an apocalyptic number.

It is an amenable number.

51343657 is a deficient number, since it is larger than the sum of its proper divisors (1656279).

51343657 is a wasteful number, since it uses less digits than its factorization.

51343657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656278.

The product of its digits is 37800, while the sum is 34.

The square root of 51343657 is about 7165.4488345113. The cubic root of 51343657 is about 371.6740723476.

The spelling of 51343657 in words is "fifty-one million, three hundred forty-three thousand, six hundred fifty-seven".