51381093 has 8 divisors (see below), whose sum is σ = 69631456. Its totient is φ = 33692400.

The previous prime is 51381091. The next prime is 51381097. The reversal of 51381093 is 39018315.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51381093 - 2¹ = 51381091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51381093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51381091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140203 + ... + 140568.

It is an arithmetic number, because the mean of its divisors is an integer number (8703932).

Almost surely, 2^51381093 is an apocalyptic number.

It is an amenable number.

51381093 is a deficient number, since it is larger than the sum of its proper divisors (18250363).

51381093 is a wasteful number, since it uses less digits than its factorization.

51381093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280835.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 51381093 is about 7168.0606163732. The cubic root of 51381093 is about 371.7643828232.

The spelling of 51381093 in words is "fifty-one million, three hundred eighty-one thousand, ninety-three".