56353621 has 2 divisors, whose sum is σ = 56353622. Its totient is φ = 56353620.

The previous prime is 56353603. The next prime is 56353663. The reversal of 56353621 is 12635365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31203396 + 25150225 = 5586^2 + 5015^2 .

It is a cyclic number.

It is not a de Polignac number, because 56353621 - 2¹⁷ = 56222549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56353021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28176810 + 28176811.

It is an arithmetic number, because the mean of its divisors is an integer number (28176811).

Almost surely, 2^56353621 is an apocalyptic number.

It is an amenable number.

56353621 is a deficient number, since it is larger than the sum of its proper divisors (1).

56353621 is an equidigital number, since it uses as much as digits as its factorization.

56353621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 31.

The square root of 56353621 is about 7506.9048881680. The cubic root of 56353621 is about 383.3898481683.

Adding to 56353621 its reverse (12635365), we get a palindrome (68988986).

The spelling of 56353621 in words is "fifty-six million, three hundred fifty-three thousand, six hundred twenty-one".