52421406124561 has 16 divisors (see below), whose sum is σ = 52915495121280. Its totient is φ = 51928821584640.

The previous prime is 52421406124523. The next prime is 52421406124589. The reversal of 52421406124561 is 16542160412425.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52421406124561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52421406124501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168637300 + ... + 168947866.

It is an arithmetic number, because the mean of its divisors is an integer number (3307218445080).

Almost surely, 2^{52421406124561} is an apocalyptic number.

It is an amenable number.

52421406124561 is a deficient number, since it is larger than the sum of its proper divisors (494088996719).

52421406124561 is a wasteful number, since it uses less digits than its factorization.

52421406124561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312984.

The product of its (nonzero) digits is 460800, while the sum is 43.

Adding to 52421406124561 its reverse (16542160412425), we get a palindrome (68963566536986).

The spelling of 52421406124561 in words is "fifty-two trillion, four hundred twenty-one billion, four hundred six million, one hundred twenty-four thousand, five hundred sixty-one".