51790261 has 2 divisors, whose sum is σ = 51790262. Its totient is φ = 51790260.

The previous prime is 51790231. The next prime is 51790283. The reversal of 51790261 is 16209715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43639236 + 8151025 = 6606^2 + 2855^2 .

It is a cyclic number.

It is not a de Polignac number, because 51790261 - 2⁵ = 51790229 is a prime.

It is a super-2 number, since 2×51790261² = 5364462268896242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51790231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25895130 + 25895131.

It is an arithmetic number, because the mean of its divisors is an integer number (25895131).

Almost surely, 2^51790261 is an apocalyptic number.

It is an amenable number.

51790261 is a deficient number, since it is larger than the sum of its proper divisors (1).

51790261 is an equidigital number, since it uses as much as digits as its factorization.

51790261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 51790261 is about 7196.5450738531. The cubic root of 51790261 is about 372.7486105193.

Adding to 51790261 its reverse (16209715), we get a palindrome (67999976).

The spelling of 51790261 in words is "fifty-one million, seven hundred ninety thousand, two hundred sixty-one".