55341621521 has 2 divisors, whose sum is σ = 55341621522. Its totient is φ = 55341621520.

The previous prime is 55341621487. The next prime is 55341621563. The reversal of 55341621521 is 12512614355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55241921296 + 99700225 = 235036^2 + 9985^2 .

It is a cyclic number.

It is not a de Polignac number, because 55341621521 - 2⁶ = 55341621457 is a prime.

It is a super-2 number, since 2×55341621521² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55341629521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27670810760 + 27670810761.

It is an arithmetic number, because the mean of its divisors is an integer number (27670810761).

Almost surely, 2^55341621521 is an apocalyptic number.

It is an amenable number.

55341621521 is a deficient number, since it is larger than the sum of its proper divisors (1).

55341621521 is an equidigital number, since it uses as much as digits as its factorization.

55341621521 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 55341621521 in words is "fifty-five billion, three hundred forty-one million, six hundred twenty-one thousand, five hundred twenty-one".