1158222156 has 96 divisors (see below), whose sum is σ = 3382740480. Its totient is φ = 300271104.

The previous prime is 1158222139. The next prime is 1158222173. The reversal of 1158222156 is 6512228511.

It is an interprime number because it is at equal distance from previous prime (1158222139) and next prime (1158222173).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55440 + ... + 73416.

It is an arithmetic number, because the mean of its divisors is an integer number (35236880).

Almost surely, 2^1158222156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1158222156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1691370240).

1158222156 is an abundant number, since it is smaller than the sum of its proper divisors (2224518324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1158222156 is a wasteful number, since it uses less digits than its factorization.

1158222156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18063 (or 18061 counting only the distinct ones).

The product of its digits is 9600, while the sum is 33.

The square root of 1158222156 is about 34032.6630753457. The cubic root of 1158222156 is about 1050.1805149960.

The spelling of 1158222156 in words is "one billion, one hundred fifty-eight million, two hundred twenty-two thousand, one hundred fifty-six".