51136393 has 8 divisors (see below), whose sum is σ = 63754560. Its totient is φ = 39846480.

The previous prime is 51136381. The next prime is 51136409. The reversal of 51136393 is 39363115.

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-51136393 is a prime.

It is a super-2 number, since 2×51136393² = 5229861378100898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51136793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331978 + ... + 332131.

It is an arithmetic number, because the mean of its divisors is an integer number (7969320).

Almost surely, 2^51136393 is an apocalyptic number.

It is an amenable number.

51136393 is a deficient number, since it is larger than the sum of its proper divisors (12618167).

51136393 is a wasteful number, since it uses less digits than its factorization.

51136393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664127.

The product of its digits is 7290, while the sum is 31.

The square root of 51136393 is about 7150.9714724644. The cubic root of 51136393 is about 371.1732734153.

It can be divided in two parts, 51136 and 393, that added together give a square (51529 = 227²).

The spelling of 51136393 in words is "fifty-one million, one hundred thirty-six thousand, three hundred ninety-three".