51073985 has 8 divisors (see below), whose sum is σ = 61977960. Its totient is φ = 40399744.

The previous prime is 51073969. The next prime is 51073991. The reversal of 51073985 is 58937015.

It can be written as a sum of positive squares in 4 ways, for example, as 10916416 + 40157569 = 3304^2 + 6337^2 .

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 51073985 - 2⁴ = 51073969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56942 + ... + 57831.

It is an arithmetic number, because the mean of its divisors is an integer number (7747245).

Almost surely, 2^51073985 is an apocalyptic number.

It is an amenable number.

51073985 is a deficient number, since it is larger than the sum of its proper divisors (10903975).

51073985 is a wasteful number, since it uses less digits than its factorization.

51073985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114867.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 51073985 is about 7146.6065373714. The cubic root of 51073985 is about 371.0222158869.

The spelling of 51073985 in words is "fifty-one million, seventy-three thousand, nine hundred eighty-five".