51771311 has 4 divisors (see below), whose sum is σ = 51811824. Its totient is φ = 51730800.

The previous prime is 51771277. The next prime is 51771319. The reversal of 51771311 is 11317715.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51771311 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 (51771319) 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, 18275 + ... + 20916.

It is an arithmetic number, because the mean of its divisors is an integer number (12952956).

Almost surely, 2^51771311 is an apocalyptic number.

51771311 is a deficient number, since it is larger than the sum of its proper divisors (40513).

51771311 is a wasteful number, since it uses less digits than its factorization.

51771311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40512.

The product of its digits is 735, while the sum is 26.

The square root of 51771311 is about 7195.2283493993. The cubic root of 51771311 is about 372.7031422032.

The spelling of 51771311 in words is "fifty-one million, seven hundred seventy-one thousand, three hundred eleven".