51693549 has 16 divisors (see below), whose sum is σ = 73301760. Its totient is φ = 32291840.

The previous prime is 51693541. The next prime is 51693553. The reversal of 51693549 is 94539615.

It is not a de Polignac number, because 51693549 - 2³ = 51693541 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51693549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51693541) 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, 10069 + ... + 14309.

It is an arithmetic number, because the mean of its divisors is an integer number (4581360).

Almost surely, 2^51693549 is an apocalyptic number.

It is an amenable number.

51693549 is a deficient number, since it is larger than the sum of its proper divisors (21608211).

51693549 is a wasteful number, since it uses less digits than its factorization.

51693549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500.

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

The square root of 51693549 is about 7189.8225986459. The cubic root of 51693549 is about 372.5164450797.

The spelling of 51693549 in words is "fifty-one million, six hundred ninety-three thousand, five hundred forty-nine".