53346421 has 2 divisors, whose sum is σ = 53346422. Its totient is φ = 53346420.

The previous prime is 53346413. The next prime is 53346431. The reversal of 53346421 is 12464335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35832196 + 17514225 = 5986^2 + 4185^2 .

It is a cyclic number.

It is not a de Polignac number, because 53346421 - 2³ = 53346413 is a prime.

It is a super-3 number, since 3×53346421³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53346421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53346431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26673210 + 26673211.

It is an arithmetic number, because the mean of its divisors is an integer number (26673211).

Almost surely, 2^53346421 is an apocalyptic number.

It is an amenable number.

53346421 is a deficient number, since it is larger than the sum of its proper divisors (1).

53346421 is an equidigital number, since it uses as much as digits as its factorization.

53346421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 28.

The square root of 53346421 is about 7303.8634297199. The cubic root of 53346421 is about 376.4451989489.

The spelling of 53346421 in words is "fifty-three million, three hundred forty-six thousand, four hundred twenty-one".