1140215551 has 8 divisors (see below), whose sum is σ = 1207589904. Its totient is φ = 1072874880.

The previous prime is 1140215521. The next prime is 1140215561. The reversal of 1140215551 is 1555120411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1140215551 - 2⁵ = 1140215519 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 (1140215521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105181 + ... + 115513.

It is an arithmetic number, because the mean of its divisors is an integer number (150948738).

Almost surely, 2^1140215551 is an apocalyptic number.

1140215551 is a deficient number, since it is larger than the sum of its proper divisors (67374353).

1140215551 is a wasteful number, since it uses less digits than its factorization.

1140215551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16841.

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 1140215551 is about 33767.0779162189. The cubic root of 1140215551 is about 1044.7097630365.

Adding to 1140215551 its reverse (1555120411), we get a palindrome (2695335962).

The spelling of 1140215551 in words is "one billion, one hundred forty million, two hundred fifteen thousand, five hundred fifty-one".