51445711 has 8 divisors (see below), whose sum is σ = 54652400. Its totient is φ = 48288960.

The previous prime is 51445703. The next prime is 51445717. The reversal of 51445711 is 11754415.

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

It is a 6-Lehmer number, since φ(51445711) divides (51445711-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 51445711 - 2³ = 51445703 is a prime.

It is a super-2 number, since 2×51445711² = 5293322360591042, which contains 22 as substring.

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 51445711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51445717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10350 + ... + 14491.

It is an arithmetic number, because the mean of its divisors is an integer number (6831550).

Almost surely, 2^51445711 is an apocalyptic number.

51445711 is a deficient number, since it is larger than the sum of its proper divisors (3206689).

51445711 is a wasteful number, since it uses less digits than its factorization.

51445711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24969.

The product of its digits is 2800, while the sum is 28.

The square root of 51445711 is about 7172.5665559826. The cubic root of 51445711 is about 371.9201639095.

It can be divided in two parts, 514 and 45711, that added together give a square (46225 = 215²).

The spelling of 51445711 in words is "fifty-one million, four hundred forty-five thousand, seven hundred eleven".