51634745 has 4 divisors (see below), whose sum is σ = 61961700. Its totient is φ = 41307792.

The previous prime is 51634733. The next prime is 51634753. The reversal of 51634745 is 54743615.

51634745 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 can be written as a sum of positive squares in 2 ways, for example, as 23193856 + 28440889 = 4816^2 + 5333^2 .

It is a cyclic number.

It is not a de Polignac number, because 51634745 - 2¹⁶ = 51569209 is a prime.

It is a super-2 number, since 2×51634745² = 5332293782430050, which contains 22 as substring.

It is an unprimeable number.

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, 5163470 + ... + 5163479.

It is an arithmetic number, because the mean of its divisors is an integer number (15490425).

Almost surely, 2^51634745 is an apocalyptic number.

It is an amenable number.

51634745 is a deficient number, since it is larger than the sum of its proper divisors (10326955).

51634745 is a wasteful number, since it uses less digits than its factorization.

51634745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10326954.

The product of its digits is 50400, while the sum is 35.

The square root of 51634745 is about 7185.7320434316. The cubic root of 51634745 is about 372.3751394500.

The spelling of 51634745 in words is "fifty-one million, six hundred thirty-four thousand, seven hundred forty-five".