53771021 has 2 divisors, whose sum is σ = 53771022. Its totient is φ = 53771020.

The previous prime is 53771009. The next prime is 53771057. The reversal of 53771021 is 12017735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52041796 + 1729225 = 7214^2 + 1315^2 .

It is a cyclic number.

It is not a de Polignac number, because 53771021 - 2¹⁴ = 53754637 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53771071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26885510 + 26885511.

It is an arithmetic number, because the mean of its divisors is an integer number (26885511).

Almost surely, 2^53771021 is an apocalyptic number.

It is an amenable number.

53771021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53771021 is an equidigital number, since it uses as much as digits as its factorization.

53771021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 53771021 is about 7332.8726294679. The cubic root of 53771021 is about 377.4413071916.

Adding to 53771021 its reverse (12017735), we get a palindrome (65788756).

The spelling of 53771021 in words is "fifty-three million, seven hundred seventy-one thousand, twenty-one".