51473661 has 16 divisors (see below), whose sum is σ = 69451200. Its totient is φ = 33909120.

The previous prime is 51473657. The next prime is 51473663. The reversal of 51473661 is 16637415.

It is not a de Polignac number, because 51473661 - 2² = 51473657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51473663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147315 + ... + 147663.

It is an arithmetic number, because the mean of its divisors is an integer number (4340700).

Almost surely, 2^51473661 is an apocalyptic number.

It is an amenable number.

51473661 is a deficient number, since it is larger than the sum of its proper divisors (17977539).

51473661 is a wasteful number, since it uses less digits than its factorization.

51473661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796.

The product of its digits is 15120, while the sum is 33.

The square root of 51473661 is about 7174.5146874196. The cubic root of 51473661 is about 371.9875053614.

The spelling of 51473661 in words is "fifty-one million, four hundred seventy-three thousand, six hundred sixty-one".