56521541 has 2 divisors, whose sum is σ = 56521542. Its totient is φ = 56521540.

The previous prime is 56521537. The next prime is 56521547. The reversal of 56521541 is 14512565.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43890625 + 12630916 = 6625^2 + 3554^2 .

It is a cyclic number.

It is not a de Polignac number, because 56521541 - 2² = 56521537 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56521547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28260770 + 28260771.

It is an arithmetic number, because the mean of its divisors is an integer number (28260771).

Almost surely, 2^56521541 is an apocalyptic number.

It is an amenable number.

56521541 is a deficient number, since it is larger than the sum of its proper divisors (1).

56521541 is an equidigital number, since it uses as much as digits as its factorization.

56521541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 29.

The square root of 56521541 is about 7518.0809386439. The cubic root of 56521541 is about 383.7702732024.

The spelling of 56521541 in words is "fifty-six million, five hundred twenty-one thousand, five hundred forty-one".