51694511 has 8 divisors (see below), whose sum is σ = 57319248. Its totient is φ = 46224000.

The previous prime is 51694499. The next prime is 51694523. The reversal of 51694511 is 11549615.

It is an interprime number because it is at equal distance from previous prime (51694499) and next prime (51694523).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51694511 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 (51693511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37850 + ... + 39191.

It is an arithmetic number, because the mean of its divisors is an integer number (7164906).

Almost surely, 2^51694511 is an apocalyptic number.

51694511 is a deficient number, since it is larger than the sum of its proper divisors (5624737).

51694511 is a wasteful number, since it uses less digits than its factorization.

51694511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77113.

The product of its digits is 5400, while the sum is 32.

The square root of 51694511 is about 7189.8894984555. The cubic root of 51694511 is about 372.5187558684.

Subtracting from 51694511 its reverse (11549615), we obtain a square (40144896 = 6336²).

The spelling of 51694511 in words is "fifty-one million, six hundred ninety-four thousand, five hundred eleven".