51521077 has 2 divisors, whose sum is σ = 51521078. Its totient is φ = 51521076.

The previous prime is 51521021. The next prime is 51521089. The reversal of 51521077 is 77012515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41873841 + 9647236 = 6471^2 + 3106^2 .

It is a cyclic number.

It is not a de Polignac number, because 51521077 - 2²³ = 43132469 is a prime.

It is equal to p_3086821 and since 51521077 and 3086821 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51521017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25760538 + 25760539.

It is an arithmetic number, because the mean of its divisors is an integer number (25760539).

Almost surely, 2^51521077 is an apocalyptic number.

It is an amenable number.

51521077 is a deficient number, since it is larger than the sum of its proper divisors (1).

51521077 is an equidigital number, since it uses as much as digits as its factorization.

51521077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 51521077 is about 7177.8184011578. The cubic root of 51521077 is about 372.1016915689.

The spelling of 51521077 in words is "fifty-one million, five hundred twenty-one thousand, seventy-seven".