51362761 has 4 divisors (see below), whose sum is σ = 51892372. Its totient is φ = 50833152.

The previous prime is 51362747. The next prime is 51362789. The reversal of 51362761 is 16726315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16726315 = 5 ⋅3345263.

It can be written as a sum of positive squares in 2 ways, for example, as 27499536 + 23863225 = 5244^2 + 4885^2 .

It is a cyclic number.

It is not a de Polignac number, because 51362761 - 2⁹ = 51362249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51362711) 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, 264660 + ... + 264853.

It is an arithmetic number, because the mean of its divisors is an integer number (12973093).

Almost surely, 2^51362761 is an apocalyptic number.

It is an amenable number.

51362761 is a deficient number, since it is larger than the sum of its proper divisors (529611).

51362761 is an equidigital number, since it uses as much as digits as its factorization.

51362761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529610.

The product of its digits is 7560, while the sum is 31.

The square root of 51362761 is about 7166.7817742694. The cubic root of 51362761 is about 371.7201642534.

The spelling of 51362761 in words is "fifty-one million, three hundred sixty-two thousand, seven hundred sixty-one".