1144015551 has 12 divisors (see below), whose sum is σ = 1888533712. Its totient is φ = 653723136.

The previous prime is 1144015549. The next prime is 1144015571. The reversal of 1144015551 is 1555104411.

It is not a de Polignac number, because 1144015551 - 2¹ = 1144015549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144015531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9079426 + ... + 9079551.

Almost surely, 2^1144015551 is an apocalyptic number.

1144015551 is a deficient number, since it is larger than the sum of its proper divisors (744518161).

1144015551 is a wasteful number, since it uses less digits than its factorization.

1144015551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18158990 (or 18158987 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 1144015551 is about 33823.2989372710. The cubic root of 1144015551 is about 1045.8690453262.

Adding to 1144015551 its reverse (1555104411), we get a palindrome (2699119962).

The spelling of 1144015551 in words is "one billion, one hundred forty-four million, fifteen thousand, five hundred fifty-one".