53990202221 has 2 divisors, whose sum is σ = 53990202222. Its totient is φ = 53990202220.

The previous prime is 53990202209. The next prime is 53990202223. The reversal of 53990202221 is 12220209935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52560606121 + 1429596100 = 229261^2 + 37810^2 .

It is a cyclic number.

It is not a de Polignac number, because 53990202221 - 2³⁴ = 36810333037 is a prime.

Together with 53990202223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53990202223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26995101110 + 26995101111.

It is an arithmetic number, because the mean of its divisors is an integer number (26995101111).

Almost surely, 2^53990202221 is an apocalyptic number.

It is an amenable number.

53990202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

53990202221 is an equidigital number, since it uses as much as digits as its factorization.

53990202221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The spelling of 53990202221 in words is "fifty-three billion, nine hundred ninety million, two hundred two thousand, two hundred twenty-one".