51051207 has 4 divisors (see below), whose sum is σ = 68068280. Its totient is φ = 34034136.

The previous prime is 51051179. The next prime is 51051241. The reversal of 51051207 is 70215015.

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

It is not a de Polignac number, because 51051207 - 2¹⁹ = 50526919 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 (51051907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8508532 + ... + 8508537.

It is an arithmetic number, because the mean of its divisors is an integer number (17017070).

Almost surely, 2^51051207 is an apocalyptic number.

51051207 is a deficient number, since it is larger than the sum of its proper divisors (17017073).

51051207 is a wasteful number, since it uses less digits than its factorization.

51051207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17017072.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 51051207 is about 7145.0127361678. The cubic root of 51051207 is about 370.9670514642.

The spelling of 51051207 in words is "fifty-one million, fifty-one thousand, two hundred seven".