55551211143 has 16 divisors (see below), whose sum is σ = 76464141312. Its totient is φ = 35836416000.

The previous prime is 55551211123. The next prime is 55551211169. The reversal of 55551211143 is 34111215555.

It is a happy number.

It is not a de Polignac number, because 55551211143 - 2¹³ = 55551202951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55551211123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1649988 + ... + 1683318.

It is an arithmetic number, because the mean of its divisors is an integer number (4779008832).

Almost surely, 2^55551211143 is an apocalyptic number.

55551211143 is a deficient number, since it is larger than the sum of its proper divisors (20912930169).

55551211143 is a wasteful number, since it uses less digits than its factorization.

55551211143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51286.

The product of its digits is 15000, while the sum is 33.

Adding to 55551211143 its reverse (34111215555), we get a palindrome (89662426698).

The spelling of 55551211143 in words is "fifty-five billion, five hundred fifty-one million, two hundred eleven thousand, one hundred forty-three".