55031101 has 2 divisors, whose sum is σ = 55031102. Its totient is φ = 55031100.

The previous prime is 55031083. The next prime is 55031147. The reversal of 55031101 is 10113055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38007225 + 17023876 = 6165^2 + 4126^2 .

It is a cyclic number.

It is not a de Polignac number, because 55031101 - 2⁵ = 55031069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55031191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27515550 + 27515551.

It is an arithmetic number, because the mean of its divisors is an integer number (27515551).

Almost surely, 2^55031101 is an apocalyptic number.

It is an amenable number.

55031101 is a deficient number, since it is larger than the sum of its proper divisors (1).

55031101 is an equidigital number, since it uses as much as digits as its factorization.

55031101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 55031101 is about 7418.2950197468. The cubic root of 55031101 is about 380.3669147656.

Adding to 55031101 its reverse (10113055), we get a palindrome (65144156).

The spelling of 55031101 in words is "fifty-five million, thirty-one thousand, one hundred one".