51478633 has 4 divisors (see below), whose sum is σ = 51505920. Its totient is φ = 51451348.

The previous prime is 51478613. The next prime is 51478643. The reversal of 51478633 is 33687415.

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.

It is a cyclic number.

It is not a de Polignac number, because 51478633 - 2⁹ = 51478121 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 51478592 and 51478601.

It is not an unprimeable number, because it can be changed into a prime (51478613) 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, 10585 + ... + 14662.

It is an arithmetic number, because the mean of its divisors is an integer number (12876480).

Almost surely, 2^51478633 is an apocalyptic number.

It is an amenable number.

51478633 is a deficient number, since it is larger than the sum of its proper divisors (27287).

51478633 is a wasteful number, since it uses less digits than its factorization.

51478633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27286.

The product of its digits is 60480, while the sum is 37.

The square root of 51478633 is about 7174.8611833261. The cubic root of 51478633 is about 371.9994821167. Note that the first 3 decimals are identical.

The spelling of 51478633 in words is "fifty-one million, four hundred seventy-eight thousand, six hundred thirty-three".