53165557 has 2 divisors, whose sum is σ = 53165558. Its totient is φ = 53165556.

The previous prime is 53165537. The next prime is 53165569. The reversal of 53165557 is 75556135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52867441 + 298116 = 7271^2 + 546^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53165557 is a prime.

It is a super-2 number, since 2×53165557² = 5653152902240498, which contains 22 as substring.

It is equal to p_3179395 and since 53165557 and 3179395 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 (53165537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26582778 + 26582779.

It is an arithmetic number, because the mean of its divisors is an integer number (26582779).

Almost surely, 2^53165557 is an apocalyptic number.

It is an amenable number.

53165557 is a deficient number, since it is larger than the sum of its proper divisors (1).

53165557 is an equidigital number, since it uses as much as digits as its factorization.

53165557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78750, while the sum is 37.

The square root of 53165557 is about 7291.4715250078. The cubic root of 53165557 is about 376.0192879988.

The spelling of 53165557 in words is "fifty-three million, one hundred sixty-five thousand, five hundred fifty-seven".