53502821 has 2 divisors, whose sum is σ = 53502822. Its totient is φ = 53502820.

The previous prime is 53502769. The next prime is 53502833. The reversal of 53502821 is 12820535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36602500 + 16900321 = 6050^2 + 4111^2 .

It is a cyclic number.

It is not a de Polignac number, because 53502821 - 2¹⁰ = 53501797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53502871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26751410 + 26751411.

It is an arithmetic number, because the mean of its divisors is an integer number (26751411).

Almost surely, 2^53502821 is an apocalyptic number.

It is an amenable number.

53502821 is a deficient number, since it is larger than the sum of its proper divisors (1).

53502821 is an equidigital number, since it uses as much as digits as its factorization.

53502821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 53502821 is about 7314.5622562119. The cubic root of 53502821 is about 376.8127249193.

The spelling of 53502821 in words is "fifty-three million, five hundred two thousand, eight hundred twenty-one".