131211055 has 16 divisors (see below), whose sum is σ = 166301280. Its totient is φ = 99107712.

The previous prime is 131211043. The next prime is 131211089. The reversal of 131211055 is 550112131.

It is a cyclic number.

It is not a de Polignac number, because 131211055 - 2⁹ = 131210543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27937 + ... + 32293.

It is an arithmetic number, because the mean of its divisors is an integer number (10393830).

Almost surely, 2^131211055 is an apocalyptic number.

131211055 is a deficient number, since it is larger than the sum of its proper divisors (35090225).

131211055 is a wasteful number, since it uses less digits than its factorization.

131211055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4698.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 131211055 is about 11454.7394121385. The cubic root of 131211055 is about 508.1479086019.

Adding to 131211055 its reverse (550112131), we get a palindrome (681323186).

The spelling of 131211055 in words is "one hundred thirty-one million, two hundred eleven thousand, fifty-five".