1161610223 has 4 divisors (see below), whose sum is σ = 1162261320. Its totient is φ = 1160959128.

The previous prime is 1161610189. The next prime is 1161610249. The reversal of 1161610223 is 3220161611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3220161611 = 31 ⋅103876181.

It is a cyclic number.

It is not a de Polignac number, because 1161610223 - 2⁶ = 1161610159 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 (1161610253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322865 + ... + 326442.

It is an arithmetic number, because the mean of its divisors is an integer number (290565330).

Almost surely, 2^1161610223 is an apocalyptic number.

1161610223 is a deficient number, since it is larger than the sum of its proper divisors (651097).

1161610223 is an equidigital number, since it uses as much as digits as its factorization.

1161610223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651096.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1161610223 is about 34082.4034217072. The cubic root of 1161610223 is about 1051.2035248887.

Adding to 1161610223 its reverse (3220161611), we get a palindrome (4381771834).

The spelling of 1161610223 in words is "one billion, one hundred sixty-one million, six hundred ten thousand, two hundred twenty-three".