53061212621 has 2 divisors, whose sum is σ = 53061212622. Its totient is φ = 53061212620.

The previous prime is 53061212587. The next prime is 53061212663. The reversal of 53061212621 is 12621216035.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44114701225 + 8946511396 = 210035^2 + 94586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53061212621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53061218621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26530606310 + 26530606311.

It is an arithmetic number, because the mean of its divisors is an integer number (26530606311).

Almost surely, 2^53061212621 is an apocalyptic number.

It is an amenable number.

53061212621 is a deficient number, since it is larger than the sum of its proper divisors (1).

53061212621 is an equidigital number, since it uses as much as digits as its factorization.

53061212621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 53061212621 its reverse (12621216035), we get a palindrome (65682428656).

The spelling of 53061212621 in words is "fifty-three billion, sixty-one million, two hundred twelve thousand, six hundred twenty-one".