51693207 has 4 divisors (see below), whose sum is σ = 68924280. Its totient is φ = 34462136.

The previous prime is 51693203. The next prime is 51693211. The reversal of 51693207 is 70239615.

51693207 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 an interprime number because it is at equal distance from previous prime (51693203) and next prime (51693211).

It is a cyclic number.

It is not a de Polignac number, because 51693207 - 2² = 51693203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51693203) 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 3 ways as a sum of consecutive naturals, for example, 8615532 + ... + 8615537.

It is an arithmetic number, because the mean of its divisors is an integer number (17231070).

Almost surely, 2^51693207 is an apocalyptic number.

51693207 is a deficient number, since it is larger than the sum of its proper divisors (17231073).

51693207 is a wasteful number, since it uses less digits than its factorization.

51693207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17231072.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 51693207 is about 7189.7988149878. The cubic root of 51693207 is about 372.5156235658.

The spelling of 51693207 in words is "fifty-one million, six hundred ninety-three thousand, two hundred seven".