51069893 has 4 divisors (see below), whose sum is σ = 58365600. Its totient is φ = 43774188.

The previous prime is 51069881. The next prime is 51069911. The reversal of 51069893 is 39896015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51069893 - 2¹⁸ = 50807749 is a prime.

It is a Duffinian number.

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 51069893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51069593) 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, 3647843 + ... + 3647856.

It is an arithmetic number, because the mean of its divisors is an integer number (14591400).

Almost surely, 2^51069893 is an apocalyptic number.

It is an amenable number.

51069893 is a deficient number, since it is larger than the sum of its proper divisors (7295707).

51069893 is an equidigital number, since it uses as much as digits as its factorization.

51069893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7295706.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 51069893 is about 7146.3202419147. The cubic root of 51069893 is about 371.0123069711.

The spelling of 51069893 in words is "fifty-one million, sixty-nine thousand, eight hundred ninety-three".