1156223061 has 54 divisors (see below), whose sum is σ = 1969659510. Its totient is φ = 651665952.

The previous prime is 1156223021. The next prime is 1156223071. The reversal of 1156223061 is 1603226511.

1156223061 is a `hidden beast` number, since 1 + 1 + 5 + 622 + 30 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1136027025 + 20196036 = 33705^2 + 4494^2 .

It is not a de Polignac number, because 1156223061 - 2⁹ = 1156222549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156223021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 5048895 + ... + 5049123.

Almost surely, 2^1156223061 is an apocalyptic number.

It is an amenable number.

1156223061 is a deficient number, since it is larger than the sum of its proper divisors (813436449).

1156223061 is a wasteful number, since it uses less digits than its factorization.

1156223061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1156223061 is about 34003.2801505972. The cubic root of 1156223061 is about 1049.5759621105.

Adding to 1156223061 its reverse (1603226511), we get a palindrome (2759449572).

The spelling of 1156223061 in words is "one billion, one hundred fifty-six million, two hundred twenty-three thousand, sixty-one".