53771257 has 2 divisors, whose sum is σ = 53771258. Its totient is φ = 53771256.

The previous prime is 53771233. The next prime is 53771279. The reversal of 53771257 is 75217735.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52186176 + 1585081 = 7224^2 + 1259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53771257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53771227) 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, 26885628 + 26885629.

It is an arithmetic number, because the mean of its divisors is an integer number (26885629).

Almost surely, 2^53771257 is an apocalyptic number.

It is an amenable number.

53771257 is a deficient number, since it is larger than the sum of its proper divisors (1).

53771257 is an equidigital number, since it uses as much as digits as its factorization.

53771257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51450, while the sum is 37.

The square root of 53771257 is about 7332.8887213703. Note that the first 3 decimals coincide. The cubic root of 53771257 is about 377.4418593850.

The spelling of 53771257 in words is "fifty-three million, seven hundred seventy-one thousand, two hundred fifty-seven".