53930221 has 2 divisors, whose sum is σ = 53930222. Its totient is φ = 53930220.

The previous prime is 53930209. The next prime is 53930231. The reversal of 53930221 is 12203935.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31472100 + 22458121 = 5610^2 + 4739^2 .

It is a cyclic number.

It is not a de Polignac number, because 53930221 - 2¹⁵ = 53897453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53930231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26965110 + 26965111.

It is an arithmetic number, because the mean of its divisors is an integer number (26965111).

Almost surely, 2^53930221 is an apocalyptic number.

It is an amenable number.

53930221 is a deficient number, since it is larger than the sum of its proper divisors (1).

53930221 is an equidigital number, since it uses as much as digits as its factorization.

53930221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 53930221 is about 7343.7198339806. The cubic root of 53930221 is about 377.8134373266.

The spelling of 53930221 in words is "fifty-three million, nine hundred thirty thousand, two hundred twenty-one".