51078501 has 6 divisors (see below), whose sum is σ = 73780070. Its totient is φ = 34052328.

The previous prime is 51078491. The next prime is 51078509. The reversal of 51078501 is 10587015.

51078501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 40832100 + 10246401 = 6390^2 + 3201^2 .

It is not a de Polignac number, because 51078501 - 2⁶ = 51078437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51078509) by changing a digit.

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

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2837686 + ... + 2837703.

Almost surely, 2^51078501 is an apocalyptic number.

It is an amenable number.

51078501 is a deficient number, since it is larger than the sum of its proper divisors (22701569).

51078501 is a wasteful number, since it uses less digits than its factorization.

51078501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5675395 (or 5675392 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The square root of 51078501 is about 7146.9224845384. The cubic root of 51078501 is about 371.0331509187.

The spelling of 51078501 in words is "fifty-one million, seventy-eight thousand, five hundred one".