51188761 has 8 divisors (see below), whose sum is σ = 55825280. Its totient is φ = 46652112.

The previous prime is 51188729. The next prime is 51188789. The reversal of 51188761 is 16788115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51188761 - 2⁵ = 51188729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51188761.

It is not an unprimeable number, because it can be changed into a prime (51188701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23895 + ... + 25948.

It is an arithmetic number, because the mean of its divisors is an integer number (6978160).

Almost surely, 2^51188761 is an apocalyptic number.

It is an amenable number.

51188761 is a deficient number, since it is larger than the sum of its proper divisors (4636519).

51188761 is a wasteful number, since it uses less digits than its factorization.

51188761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49935.

The product of its digits is 13440, while the sum is 37.

The square root of 51188761 is about 7154.6321358963. The cubic root of 51188761 is about 371.2999344836.

The spelling of 51188761 in words is "fifty-one million, one hundred eighty-eight thousand, seven hundred sixty-one".