55881101 has 2 divisors, whose sum is σ = 55881102. Its totient is φ = 55881100.

The previous prime is 55881079. The next prime is 55881107. The reversal of 55881101 is 10118855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55875625 + 5476 = 7475^2 + 74^2 .

It is a cyclic number.

It is not a de Polignac number, because 55881101 - 2¹⁸ = 55618957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55881107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27940550 + 27940551.

It is an arithmetic number, because the mean of its divisors is an integer number (27940551).

Almost surely, 2^55881101 is an apocalyptic number.

It is an amenable number.

55881101 is a deficient number, since it is larger than the sum of its proper divisors (1).

55881101 is an equidigital number, since it uses as much as digits as its factorization.

55881101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 29.

The square root of 55881101 is about 7475.3662786515. The cubic root of 55881101 is about 382.3152761195.

Adding to 55881101 its reverse (10118855), we get a palindrome (65999956).

The spelling of 55881101 in words is "fifty-five million, eight hundred eighty-one thousand, one hundred one".