51779901 has 4 divisors (see below), whose sum is σ = 69039872. Its totient is φ = 34519932.

The previous prime is 51779899. The next prime is 51779929. The reversal of 51779901 is 10997715.

51779901 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51779901 - 2¹ = 51779899 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 51779901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51779941) 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, 8629981 + ... + 8629986.

It is an arithmetic number, because the mean of its divisors is an integer number (17259968).

Almost surely, 2^51779901 is an apocalyptic number.

It is an amenable number.

51779901 is a deficient number, since it is larger than the sum of its proper divisors (17259971).

51779901 is a wasteful number, since it uses less digits than its factorization.

51779901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17259970.

The product of its (nonzero) digits is 19845, while the sum is 39.

The square root of 51779901 is about 7195.8252480171. The cubic root of 51779901 is about 372.7237542815.

The spelling of 51779901 in words is "fifty-one million, seven hundred seventy-nine thousand, nine hundred one".