1161443515 has 16 divisors (see below), whose sum is σ = 1407290976. Its totient is φ = 920160000.

The previous prime is 1161443513. The next prime is 1161443567. The reversal of 1161443515 is 5153441611.

It is not a de Polignac number, because 1161443515 - 2¹ = 1161443513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161443513) 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, 224599 + ... + 229711.

It is an arithmetic number, because the mean of its divisors is an integer number (87955686).

Almost surely, 2^1161443515 is an apocalyptic number.

1161443515 is a deficient number, since it is larger than the sum of its proper divisors (245847461).

1161443515 is a wasteful number, since it uses less digits than its factorization.

1161443515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5550.

The product of its digits is 7200, while the sum is 31.

The square root of 1161443515 is about 34079.9576730958. The cubic root of 1161443515 is about 1051.1532348064.

The spelling of 1161443515 in words is "one billion, one hundred sixty-one million, four hundred forty-three thousand, five hundred fifteen".