51699345 has 16 divisors (see below), whose sum is σ = 82814400. Its totient is φ = 27541184.

The previous prime is 51699343. The next prime is 51699353. The reversal of 51699345 is 54399615.

51699345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51699345 - 2¹ = 51699343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51699297 and 51699306.

It is not an unprimeable number, because it can be changed into a prime (51699341) 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 15 ways as a sum of consecutive naturals, for example, 17806 + ... + 20504.

It is an arithmetic number, because the mean of its divisors is an integer number (5175900).

Almost surely, 2^51699345 is an apocalyptic number.

It is an amenable number.

51699345 is a deficient number, since it is larger than the sum of its proper divisors (31115055).

51699345 is a wasteful number, since it uses less digits than its factorization.

51699345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3984.

The product of its digits is 145800, while the sum is 42.

The square root of 51699345 is about 7190.2256570987. The cubic root of 51699345 is about 372.5303670272.

The spelling of 51699345 in words is "fifty-one million, six hundred ninety-nine thousand, three hundred forty-five".