51761667 has 4 divisors (see below), whose sum is σ = 69015560. Its totient is φ = 34507776.

The previous prime is 51761663. The next prime is 51761683. The reversal of 51761667 is 76616715.

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

It is not a de Polignac number, because 51761667 - 2² = 51761663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51761663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8626942 + ... + 8626947.

It is an arithmetic number, because the mean of its divisors is an integer number (17253890).

Almost surely, 2^51761667 is an apocalyptic number.

51761667 is a deficient number, since it is larger than the sum of its proper divisors (17253893).

51761667 is a wasteful number, since it uses less digits than its factorization.

51761667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17253892.

The product of its digits is 52920, while the sum is 39.

The square root of 51761667 is about 7194.5581518256. The cubic root of 51761667 is about 372.6799982892.

The spelling of 51761667 in words is "fifty-one million, seven hundred sixty-one thousand, six hundred sixty-seven".