51779511 has 12 divisors (see below), whose sum is σ = 85477392. Its totient is φ = 29588256.

The previous prime is 51779489. The next prime is 51779599. The reversal of 51779511 is 11597715.

It is not a de Polignac number, because 51779511 - 2⁵ = 51779479 is a prime.

It is a super-2 number, since 2×51779511² = 5362235518798242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51779011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 410886 + ... + 411011.

It is an arithmetic number, because the mean of its divisors is an integer number (7123116).

Almost surely, 2^51779511 is an apocalyptic number.

51779511 is a deficient number, since it is larger than the sum of its proper divisors (33697881).

51779511 is a wasteful number, since it uses less digits than its factorization.

51779511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821910 (or 821907 counting only the distinct ones).

The product of its digits is 11025, while the sum is 36.

The square root of 51779511 is about 7195.7981489200. The cubic root of 51779511 is about 372.7228185090.

The spelling of 51779511 in words is "fifty-one million, seven hundred seventy-nine thousand, five hundred eleven".