1161503215 has 32 divisors (see below), whose sum is σ = 1476662400. Its totient is φ = 875696640.

The previous prime is 1161503209. The next prime is 1161503261. The reversal of 1161503215 is 5123051611.

It is a happy number.

It is not a de Polignac number, because 1161503215 - 2¹⁹ = 1160978927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1161503215.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2758705 + ... + 2759125.

It is an arithmetic number, because the mean of its divisors is an integer number (46145700).

Almost surely, 2^1161503215 is an apocalyptic number.

1161503215 is a deficient number, since it is larger than the sum of its proper divisors (315159185).

1161503215 is a wasteful number, since it uses less digits than its factorization.

1161503215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1161503215 is about 34080.8335432102. The cubic root of 1161503215 is about 1051.1712448006.

Adding to 1161503215 its reverse (5123051611), we get a palindrome (6284554826).

The spelling of 1161503215 in words is "one billion, one hundred sixty-one million, five hundred three thousand, two hundred fifteen".