51990795 has 32 divisors (see below), whose sum is σ = 93350400. Its totient is φ = 27451872.

The previous prime is 51990793. The next prime is 51990797. The reversal of 51990795 is 59709915.

It is an interprime number because it is at equal distance from previous prime (51990793) and next prime (51990797).

It is not a de Polignac number, because 51990795 - 2¹ = 51990793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51990795.

It is not an unprimeable number, because it can be changed into a prime (51990791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12036 + ... + 15774.

It is an arithmetic number, because the mean of its divisors is an integer number (2917200).

Almost surely, 2^51990795 is an apocalyptic number.

51990795 is a deficient number, since it is larger than the sum of its proper divisors (41359605).

51990795 is a wasteful number, since it uses less digits than its factorization.

51990795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856 (or 3850 counting only the distinct ones).

The product of its (nonzero) digits is 127575, while the sum is 45.

The square root of 51990795 is about 7210.4642707665. The cubic root of 51990795 is about 373.2290901736.

The spelling of 51990795 in words is "fifty-one million, nine hundred ninety thousand, seven hundred ninety-five".