51992761 has 6 divisors (see below), whose sum is σ = 52274570. Its totient is φ = 51712416.

The previous prime is 51992741. The next prime is 51992767. The reversal of 51992761 is 16729915.

51992761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 40398736 + 11594025 = 6356^2 + 3405^2 .

It is not a de Polignac number, because 51992761 - 2⁵ = 51992729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51992767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51025 + ... + 52033.

Almost surely, 2^51992761 is an apocalyptic number.

It is an amenable number.

51992761 is a deficient number, since it is larger than the sum of its proper divisors (281809).

51992761 is an equidigital number, since it uses as much as digits as its factorization.

51992761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463 (or 1236 counting only the distinct ones).

The product of its digits is 34020, while the sum is 40.

The square root of 51992761 is about 7210.6005991179. The cubic root of 51992761 is about 373.2337945906.

The spelling of 51992761 in words is "fifty-one million, nine hundred ninety-two thousand, seven hundred sixty-one".