53221771 has 2 divisors, whose sum is σ = 53221772. Its totient is φ = 53221770.

The previous prime is 53221711. The next prime is 53221787. The reversal of 53221771 is 17712235.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53221771 - 2²⁵ = 19667339 is a prime.

It is not a weakly prime, because it can be changed into another prime (53221711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26610885 + 26610886.

It is an arithmetic number, because the mean of its divisors is an integer number (26610886).

Almost surely, 2^53221771 is an apocalyptic number.

53221771 is a deficient number, since it is larger than the sum of its proper divisors (1).

53221771 is an equidigital number, since it uses as much as digits as its factorization.

53221771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2940, while the sum is 28.

The square root of 53221771 is about 7295.3252840432. The cubic root of 53221771 is about 376.1517678972.

The spelling of 53221771 in words is "fifty-three million, two hundred twenty-one thousand, seven hundred seventy-one".