51373730 has 8 divisors (see below), whose sum is σ = 92472732. Its totient is φ = 20549488.

The previous prime is 51373717. The next prime is 51373757. The reversal of 51373730 is 3737315.

It can be written as a sum of positive squares in 2 ways, for example, as 48594841 + 2778889 = 6971^2 + 1667^2 .

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

It is a super-2 number, since 2×51373730² = 5278520268225800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51373693 and 51373702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2568677 + ... + 2568696.

Almost surely, 2^51373730 is an apocalyptic number.

51373730 is a deficient number, since it is larger than the sum of its proper divisors (41099002).

51373730 is a wasteful number, since it uses less digits than its factorization.

51373730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5137380.

The product of its (nonzero) digits is 6615, while the sum is 29.

The square root of 51373730 is about 7167.5470001947. The cubic root of 51373730 is about 371.7466238140.

The spelling of 51373730 in words is "fifty-one million, three hundred seventy-three thousand, seven hundred thirty".