1012155323 has 4 divisors (see below), whose sum is σ = 1015348560. Its totient is φ = 1008962088.

The previous prime is 1012155317. The next prime is 1012155341. The reversal of 1012155323 is 3235512101.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1012155323 - 2⁴ = 1012155307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012155373) 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, 1596143 + ... + 1596776.

It is an arithmetic number, because the mean of its divisors is an integer number (253837140).

Almost surely, 2^1012155323 is an apocalyptic number.

1012155323 is a deficient number, since it is larger than the sum of its proper divisors (3193237).

1012155323 is an equidigital number, since it uses as much as digits as its factorization.

1012155323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193236.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1012155323 is about 31814.3886158449. The cubic root of 1012155323 is about 1004.0354674301.

Adding to 1012155323 its reverse (3235512101), we get a palindrome (4247667424).

The spelling of 1012155323 in words is "one billion, twelve million, one hundred fifty-five thousand, three hundred twenty-three".