55835621 has 2 divisors, whose sum is σ = 55835622. Its totient is φ = 55835620.

The previous prime is 55835609. The next prime is 55835639. The reversal of 55835621 is 12653855.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50481025 + 5354596 = 7105^2 + 2314^2 .

It is a cyclic number.

It is not a de Polignac number, because 55835621 - 2¹⁴ = 55819237 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55835821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27917810 + 27917811.

It is an arithmetic number, because the mean of its divisors is an integer number (27917811).

Almost surely, 2^55835621 is an apocalyptic number.

It is an amenable number.

55835621 is a deficient number, since it is larger than the sum of its proper divisors (1).

55835621 is an equidigital number, since it uses as much as digits as its factorization.

55835621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 35.

The square root of 55835621 is about 7472.3236680433. The cubic root of 55835621 is about 382.2115295475.

The spelling of 55835621 in words is "fifty-five million, eight hundred thirty-five thousand, six hundred twenty-one".