53771569 has 2 divisors, whose sum is σ = 53771570. Its totient is φ = 53771568.

The previous prime is 53771551. The next prime is 53771573. The reversal of 53771569 is 96517735.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53479969 + 291600 = 7313^2 + 540^2 .

It is a cyclic number.

It is not a de Polignac number, because 53771569 - 2⁹ = 53771057 is a prime.

It is a super-2 number, since 2×53771569² = 5782763265443522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53771519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26885784 + 26885785.

It is an arithmetic number, because the mean of its divisors is an integer number (26885785).

Almost surely, 2^53771569 is an apocalyptic number.

It is an amenable number.

53771569 is a deficient number, since it is larger than the sum of its proper divisors (1).

53771569 is an equidigital number, since it uses as much as digits as its factorization.

53771569 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 53771569 is about 7332.9099953566. The cubic root of 53771569 is about 377.4425894010.

The spelling of 53771569 in words is "fifty-three million, seven hundred seventy-one thousand, five hundred sixty-nine".