51759481 has 2 divisors, whose sum is σ = 51759482. Its totient is φ = 51759480.

The previous prime is 51759473. The next prime is 51759503. The reversal of 51759481 is 18495715.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44555625 + 7203856 = 6675^2 + 2684^2 .

It is a cyclic number.

It is not a de Polignac number, because 51759481 - 2³ = 51759473 is a prime.

It is a super-2 number, since 2×51759481² = 5358087746778722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51709481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25879740 + 25879741.

It is an arithmetic number, because the mean of its divisors is an integer number (25879741).

Almost surely, 2^51759481 is an apocalyptic number.

It is an amenable number.

51759481 is a deficient number, since it is larger than the sum of its proper divisors (1).

51759481 is an equidigital number, since it uses as much as digits as its factorization.

51759481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 40.

The square root of 51759481 is about 7194.4062298427. The cubic root of 51759481 is about 372.6747518717.

The spelling of 51759481 in words is "fifty-one million, seven hundred fifty-nine thousand, four hundred eighty-one".