51013399 has 4 divisors (see below), whose sum is σ = 51029920. Its totient is φ = 50996880.

The previous prime is 51013393. The next prime is 51013409. The reversal of 51013399 is 99331015.

51013399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51013399 - 2¹¹ = 51011351 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 51013399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51013393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2094 + ... + 10315.

It is an arithmetic number, because the mean of its divisors is an integer number (12757480).

Almost surely, 2^51013399 is an apocalyptic number.

51013399 is a deficient number, since it is larger than the sum of its proper divisors (16521).

51013399 is a wasteful number, since it uses less digits than its factorization.

51013399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16520.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 51013399 is about 7142.3664845764. The cubic root of 51013399 is about 370.8754507172.

The spelling of 51013399 in words is "fifty-one million, thirteen thousand, three hundred ninety-nine".