51697532 has 12 divisors (see below), whose sum is σ = 90900936. Its totient is φ = 25725840.

The previous prime is 51697531. The next prime is 51697571. The reversal of 51697532 is 23579615.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51697531) 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, 29783 + ... + 31470.

It is an arithmetic number, because the mean of its divisors is an integer number (7575078).

Almost surely, 2^51697532 is an apocalyptic number.

It is an amenable number.

51697532 is a deficient number, since it is larger than the sum of its proper divisors (39203404).

51697532 is a wasteful number, since it uses less digits than its factorization.

51697532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61468 (or 61466 counting only the distinct ones).

The product of its digits is 56700, while the sum is 38.

The square root of 51697532 is about 7190.0995820642. The cubic root of 51697532 is about 372.5260123270.

The spelling of 51697532 in words is "fifty-one million, six hundred ninety-seven thousand, five hundred thirty-two".