51969393 has 12 divisors (see below), whose sum is σ = 85790848. Its totient is φ = 29696760.

The previous prime is 51969367. The next prime is 51969431. The reversal of 51969393 is 39396915.

It is not a de Polignac number, because 51969393 - 2¹² = 51965297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51969343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 412393 + ... + 412518.

Almost surely, 2^51969393 is an apocalyptic number.

It is an amenable number.

51969393 is a deficient number, since it is larger than the sum of its proper divisors (33821455).

51969393 is a wasteful number, since it uses less digits than its factorization.

51969393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824924 (or 824921 counting only the distinct ones).

The product of its digits is 196830, while the sum is 45.

The square root of 51969393 is about 7208.9800249411. The cubic root of 51969393 is about 373.1778699188.

The spelling of 51969393 in words is "fifty-one million, nine hundred sixty-nine thousand, three hundred ninety-three".