1144213155 has 32 divisors (see below), whose sum is σ = 2141222400. Its totient is φ = 578127456.

The previous prime is 1144213151. The next prime is 1144213163. The reversal of 1144213155 is 5513124411.

It is not a de Polignac number, because 1144213155 - 2² = 1144213151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1144213151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220479 + ... + 225608.

It is an arithmetic number, because the mean of its divisors is an integer number (66913200).

Almost surely, 2^1144213155 is an apocalyptic number.

1144213155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1144213155 is a deficient number, since it is larger than the sum of its proper divisors (997009245).

1144213155 is a wasteful number, since it uses less digits than its factorization.

1144213155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446120 (or 446114 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 1144213155 is about 33826.2199336550. The cubic root of 1144213155 is about 1045.9292589624.

Adding to 1144213155 its reverse (5513124411), we get a palindrome (6657337566).

The spelling of 1144213155 in words is "one billion, one hundred forty-four million, two hundred thirteen thousand, one hundred fifty-five".