1161550211 has 8 divisors (see below), whose sum is σ = 1238133600. Its totient is φ = 1085884288.

The previous prime is 1161550189. The next prime is 1161550241. The reversal of 1161550211 is 1120551611.

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 1161550211 - 2¹⁸ = 1161288067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161550241) 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, 226751 + ... + 231816.

It is an arithmetic number, because the mean of its divisors is an integer number (154766700).

Almost surely, 2^1161550211 is an apocalyptic number.

1161550211 is a deficient number, since it is larger than the sum of its proper divisors (76583389).

1161550211 is a wasteful number, since it uses less digits than its factorization.

1161550211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458733.

The product of its (nonzero) digits is 300, while the sum is 23.

The square root of 1161550211 is about 34081.5230146776. The cubic root of 1161550211 is about 1051.1854218822.

The spelling of 1161550211 in words is "one billion, one hundred sixty-one million, five hundred fifty thousand, two hundred eleven".