1213306055 has 16 divisors (see below), whose sum is σ = 1618546944. Its totient is φ = 867075840.

The previous prime is 1213306021. The next prime is 1213306067. The reversal of 1213306055 is 5506033121.

It is not a de Polignac number, because 1213306055 - 2⁶ = 1213305991 is a prime.

It is a super-2 number, since 2×1213306055² = 2944223166199326050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299054 + ... + 303083.

It is an arithmetic number, because the mean of its divisors is an integer number (101159184).

Almost surely, 2^1213306055 is an apocalyptic number.

1213306055 is a deficient number, since it is larger than the sum of its proper divisors (405240889).

1213306055 is a wasteful number, since it uses less digits than its factorization.

1213306055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602186.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 1213306055 is about 34832.5430452616. The cubic root of 1213306055 is about 1066.5718609858.

Adding to 1213306055 its reverse (5506033121), we get a palindrome (6719339176).

The spelling of 1213306055 in words is "one billion, two hundred thirteen million, three hundred six thousand, fifty-five".