1144215611 has 54 divisors (see below), whose sum is σ = 1532981484. Its totient is φ = 844477200.

The previous prime is 1144215593. The next prime is 1144215629. The reversal of 1144215611 is 1165124411.

It is an interprime number because it is at equal distance from previous prime (1144215593) and next prime (1144215629).

It is not a de Polignac number, because 1144215611 - 2⁶ = 1144215547 is a prime.

It is a super-2 number, since 2×1144215611² = 2618458728912206642, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (960) is a multiple of the sum of its prime divisors (96).

It is not an unprimeable number, because it can be changed into a prime (1144215011) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 24344990 + ... + 24345036.

It is an arithmetic number, because the mean of its divisors is an integer number (28388546).

Almost surely, 2^1144215611 is an apocalyptic number.

1144215611 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1144215611 is a deficient number, since it is larger than the sum of its proper divisors (388765873).

1144215611 is an equidigital number, since it uses as much as digits as its factorization.

1144215611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 96 counting only the distinct ones).

The product of its digits is 960, while the sum is 26.

The square root of 1144215611 is about 33826.2562368347. The cubic root of 1144215611 is about 1045.9300073080.

The spelling of 1144215611 in words is "one billion, one hundred forty-four million, two hundred fifteen thousand, six hundred eleven".