53461621 has 2 divisors, whose sum is σ = 53461622. Its totient is φ = 53461620.

The previous prime is 53461613. The next prime is 53461627. The reversal of 53461621 is 12616435.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53363025 + 98596 = 7305^2 + 314^2 .

It is a cyclic number.

It is not a de Polignac number, because 53461621 - 2³ = 53461613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53461621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53461627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26730810 + 26730811.

It is an arithmetic number, because the mean of its divisors is an integer number (26730811).

Almost surely, 2^53461621 is an apocalyptic number.

It is an amenable number.

53461621 is a deficient number, since it is larger than the sum of its proper divisors (1).

53461621 is an equidigital number, since it uses as much as digits as its factorization.

53461621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 53461621 is about 7311.7454140581. The cubic root of 53461621 is about 376.7159781770.

The spelling of 53461621 in words is "fifty-three million, four hundred sixty-one thousand, six hundred twenty-one".