51120473 has 4 divisors (see below), whose sum is σ = 51267300. Its totient is φ = 50973648.

The previous prime is 51120463. The next prime is 51120527. The reversal of 51120473 is 37402115.

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 38539264 + 12581209 = 6208^2 + 3547^2 .

It is a cyclic number.

It is not a de Polignac number, because 51120473 - 2⁸ = 51120217 is a prime.

It is a super-2 number, since 2×51120473² = 5226605519487458, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51120403) 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, 72890 + ... + 73587.

It is an arithmetic number, because the mean of its divisors is an integer number (12816825).

Almost surely, 2^51120473 is an apocalyptic number.

It is an amenable number.

51120473 is a deficient number, since it is larger than the sum of its proper divisors (146827).

51120473 is a wasteful number, since it uses less digits than its factorization.

51120473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146826.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 51120473 is about 7149.8582503431. The cubic root of 51120473 is about 371.1347510017.

Adding to 51120473 its reverse (37402115), we get a palindrome (88522588).

The spelling of 51120473 in words is "fifty-one million, one hundred twenty thousand, four hundred seventy-three".