53401513421 has 4 divisors (see below), whose sum is σ = 53402318844. Its totient is φ = 53400708000.

The previous prime is 53401513409. The next prime is 53401513427. The reversal of 53401513421 is 12431510435.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51990384196 + 1411129225 = 228014^2 + 37565^2 .

It is a cyclic number.

It is not a de Polignac number, because 53401513421 - 2⁶ = 53401513357 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 (53401513427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293360 + ... + 439161.

It is an arithmetic number, because the mean of its divisors is an integer number (13350579711).

Almost surely, 2^53401513421 is an apocalyptic number.

It is an amenable number.

53401513421 is a deficient number, since it is larger than the sum of its proper divisors (805423).

53401513421 is an equidigital number, since it uses as much as digits as its factorization.

53401513421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805422.

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 53401513421 in words is "fifty-three billion, four hundred one million, five hundred thirteen thousand, four hundred twenty-one".