51634445 has 8 divisors (see below), whose sum is σ = 62320536. Its totient is φ = 41068096.

The previous prime is 51634441. The next prime is 51634463. The reversal of 51634445 is 54443615.

It can be written as a sum of positive squares in 4 ways, for example, as 2550409 + 49084036 = 1597^2 + 7006^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51634445 - 2² = 51634441 is a prime.

It is a super-2 number, since 2×51634445² = 5332231820916050, 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 (51634441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28982 + ... + 30711.

It is an arithmetic number, because the mean of its divisors is an integer number (7790067).

Almost surely, 2^51634445 is an apocalyptic number.

It is an amenable number.

51634445 is a deficient number, since it is larger than the sum of its proper divisors (10686091).

51634445 is a wasteful number, since it uses less digits than its factorization.

51634445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59871.

The product of its digits is 28800, while the sum is 32.

The square root of 51634445 is about 7185.7111687014. The cubic root of 51634445 is about 372.3744182770.

The spelling of 51634445 in words is "fifty-one million, six hundred thirty-four thousand, four hundred forty-five".