51278007 has 16 divisors (see below), whose sum is σ = 75051648. Its totient is φ = 30883680.

The previous prime is 51277997. The next prime is 51278009. The reversal of 51278007 is 70087215.

It is a happy number.

It is not a de Polignac number, because 51278007 - 2¹⁰ = 51276983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51278009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 613 + ... + 10145.

It is an arithmetic number, because the mean of its divisors is an integer number (4690728).

Almost surely, 2^51278007 is an apocalyptic number.

51278007 is a deficient number, since it is larger than the sum of its proper divisors (23773641).

51278007 is a wasteful number, since it uses less digits than its factorization.

51278007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9710.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 51278007 is about 7160.8663582000. The cubic root of 51278007 is about 371.5155924662.

The spelling of 51278007 in words is "fifty-one million, two hundred seventy-eight thousand, seven".