1161564226 has 4 divisors (see below), whose sum is σ = 1742346342. Its totient is φ = 580782112.

The previous prime is 1161564223. The next prime is 1161564281. The reversal of 1161564226 is 6224651611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 770118001 + 391446225 = 27751^2 + 19785^2 .

It is a super-2 number, since 2×1161564226² = 2698462902245958152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1161564191 and 1161564200.

It is not an unprimeable number, because it can be changed into a prime (1161564223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290391055 + ... + 290391058.

Almost surely, 2^1161564226 is an apocalyptic number.

1161564226 is a deficient number, since it is larger than the sum of its proper divisors (580782116).

1161564226 is an equidigital number, since it uses as much as digits as its factorization.

1161564226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580782115.

The product of its digits is 17280, while the sum is 34.

The square root of 1161564226 is about 34081.7286240003. The cubic root of 1161564226 is about 1051.1896496531.

The spelling of 1161564226 in words is "one billion, one hundred sixty-one million, five hundred sixty-four thousand, two hundred twenty-six".