51137995 has 4 divisors (see below), whose sum is σ = 61365600. Its totient is φ = 40910392.

The previous prime is 51137981. The next prime is 51138001. The reversal of 51137995 is 59973115.

51137995 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51137995 - 2¹⁹ = 50613707 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5113795 + ... + 5113804.

It is an arithmetic number, because the mean of its divisors is an integer number (15341400).

Almost surely, 2^51137995 is an apocalyptic number.

51137995 is a deficient number, since it is larger than the sum of its proper divisors (10227605).

51137995 is a wasteful number, since it uses less digits than its factorization.

51137995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10227604.

The product of its digits is 42525, while the sum is 40.

The square root of 51137995 is about 7151.0834843400. The cubic root of 51137995 is about 371.1771494113.

The spelling of 51137995 in words is "fifty-one million, one hundred thirty-seven thousand, nine hundred ninety-five".