1011156323 has 8 divisors (see below), whose sum is σ = 1023224400. Its totient is φ = 999104128.

The previous prime is 1011156299. The next prime is 1011156329. The reversal of 1011156323 is 3236511101.

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 1011156323 - 2²⁶ = 944047459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011156329) 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 7 ways as a sum of consecutive naturals, for example, 167288 + ... + 173226.

It is an arithmetic number, because the mean of its divisors is an integer number (127903050).

Almost surely, 2^1011156323 is an apocalyptic number.

1011156323 is a deficient number, since it is larger than the sum of its proper divisors (12068077).

1011156323 is an equidigital number, since it uses as much as digits as its factorization.

1011156323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7941.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1011156323 is about 31798.6842966812. The cubic root of 1011156323 is about 1003.7050301318.

Adding to 1011156323 its reverse (3236511101), we get a palindrome (4247667424).

The spelling of 1011156323 in words is "one billion, eleven million, one hundred fifty-six thousand, three hundred twenty-three".