51550469 has 2 divisors, whose sum is σ = 51550470. Its totient is φ = 51550468.

The previous prime is 51550417. The next prime is 51550517. The reversal of 51550469 is 96405515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32058244 + 19492225 = 5662^2 + 4415^2 .

It is a cyclic number.

It is not a de Polignac number, because 51550469 - 2²⁴ = 34773253 is a prime.

It is a super-2 number, since 2×51550469² = 5314901708239922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51550969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25775234 + 25775235.

It is an arithmetic number, because the mean of its divisors is an integer number (25775235).

Almost surely, 2^51550469 is an apocalyptic number.

It is an amenable number.

51550469 is a deficient number, since it is larger than the sum of its proper divisors (1).

51550469 is an equidigital number, since it uses as much as digits as its factorization.

51550469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 51550469 is about 7179.8655279887. The cubic root of 51550469 is about 372.1724375913.

The spelling of 51550469 in words is "fifty-one million, five hundred fifty thousand, four hundred sixty-nine".