51320711 has 4 divisors (see below), whose sum is σ = 55268472. Its totient is φ = 47372952.

The previous prime is 51320699. The next prime is 51320723. The reversal of 51320711 is 11702315.

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

It is an interprime number because it is at equal distance from previous prime (51320699) and next prime (51320723).

It is a cyclic number.

It is not a de Polignac number, because 51320711 - 2¹⁰ = 51319687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51320741) 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, 1973861 + ... + 1973886.

It is an arithmetic number, because the mean of its divisors is an integer number (13817118).

Almost surely, 2^51320711 is an apocalyptic number.

51320711 is a deficient number, since it is larger than the sum of its proper divisors (3947761).

51320711 is a wasteful number, since it uses less digits than its factorization.

51320711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947760.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 51320711 is about 7163.8474997727. The cubic root of 51320711 is about 371.6186957957.

The spelling of 51320711 in words is "fifty-one million, three hundred twenty thousand, seven hundred eleven".