51380711 has 4 divisors (see below), whose sum is σ = 51411312. Its totient is φ = 51350112.

The previous prime is 51380701. The next prime is 51380717. The reversal of 51380711 is 11708315.

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

It is a cyclic number.

It is not a de Polignac number, because 51380711 - 2¹⁸ = 51118567 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 (51380717) 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, 12626 + ... + 16191.

It is an arithmetic number, because the mean of its divisors is an integer number (12852828).

Almost surely, 2^51380711 is an apocalyptic number.

51380711 is a deficient number, since it is larger than the sum of its proper divisors (30601).

51380711 is a wasteful number, since it uses less digits than its factorization.

51380711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30600.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 51380711 is about 7168.0339703436. The cubic root of 51380711 is about 371.7634615093.

The spelling of 51380711 in words is "fifty-one million, three hundred eighty thousand, seven hundred eleven".