51357769 has 2 divisors, whose sum is σ = 51357770. Its totient is φ = 51357768.

The previous prime is 51357751. The next prime is 51357841. The reversal of 51357769 is 96775315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39879225 + 11478544 = 6315^2 + 3388^2 .

It is a cyclic number.

It is not a de Polignac number, because 51357769 - 2⁵ = 51357737 is a prime.

It is a super-2 number, since 2×51357769² = 5275240873314722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51357169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25678884 + 25678885.

It is an arithmetic number, because the mean of its divisors is an integer number (25678885).

Almost surely, 2^51357769 is an apocalyptic number.

It is an amenable number.

51357769 is a deficient number, since it is larger than the sum of its proper divisors (1).

51357769 is an equidigital number, since it uses as much as digits as its factorization.

51357769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 198450, while the sum is 43.

The square root of 51357769 is about 7166.4334923308. The cubic root of 51357769 is about 371.7081212405.

The spelling of 51357769 in words is "fifty-one million, three hundred fifty-seven thousand, seven hundred sixty-nine".