53245121403421 has 4 divisors (see below), whose sum is σ = 53245136243772. Its totient is φ = 53245106563072.

The previous prime is 53245121403379. The next prime is 53245121403479. The reversal of 53245121403421 is 12430412154235.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3040102600921 + 50205018802500 = 1743589^2 + 7085550^2 .

It is a cyclic number.

It is not a de Polignac number, because 53245121403421 - 2⁷ = 53245121403293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53245121403491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1689885 + ... + 10456861.

It is an arithmetic number, because the mean of its divisors is an integer number (13311284060943).

Almost surely, 2^{53245121403421} is an apocalyptic number.

It is an amenable number.

53245121403421 is a deficient number, since it is larger than the sum of its proper divisors (14840351).

53245121403421 is an equidigital number, since it uses as much as digits as its factorization.

53245121403421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14840350.

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 53245121403421 its reverse (12430412154235), we get a palindrome (65675533557656).

The spelling of 53245121403421 in words is "fifty-three trillion, two hundred forty-five billion, one hundred twenty-one million, four hundred three thousand, four hundred twenty-one".