51011767 has 4 divisors (see below), whose sum is σ = 51516936. Its totient is φ = 50506600.

The previous prime is 51011761. The next prime is 51011777. The reversal of 51011767 is 76711015.

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 51011767 - 2³ = 51011759 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 (51011761) 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, 252433 + ... + 252634.

It is an arithmetic number, because the mean of its divisors is an integer number (12879234).

Almost surely, 2^51011767 is an apocalyptic number.

51011767 is a deficient number, since it is larger than the sum of its proper divisors (505169).

51011767 is a wasteful number, since it uses less digits than its factorization.

51011767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505168.

The product of its (nonzero) digits is 1470, while the sum is 28.

The square root of 51011767 is about 7142.2522358147. The cubic root of 51011767 is about 370.8714957093.

The spelling of 51011767 in words is "fifty-one million, eleven thousand, seven hundred sixty-seven".