55340881 has 2 divisors, whose sum is σ = 55340882. Its totient is φ = 55340880.

The previous prime is 55340849. The next prime is 55340897. The reversal of 55340881 is 18804355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45158400 + 10182481 = 6720^2 + 3191^2 .

It is a cyclic number.

It is not a de Polignac number, because 55340881 - 2⁵ = 55340849 is a prime.

It is a super-2 number, since 2×55340881² = 6125226219712322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55340801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27670440 + 27670441.

It is an arithmetic number, because the mean of its divisors is an integer number (27670441).

Almost surely, 2^55340881 is an apocalyptic number.

It is an amenable number.

55340881 is a deficient number, since it is larger than the sum of its proper divisors (1).

55340881 is an equidigital number, since it uses as much as digits as its factorization.

55340881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 55340881 is about 7439.1451793872. The cubic root of 55340881 is about 381.0792977273.

The spelling of 55340881 in words is "fifty-five million, three hundred forty thousand, eight hundred eighty-one".