1231063158 has 32 divisors (see below), whose sum is σ = 2656033632. Its totient is φ = 378144000.

The previous prime is 1231063157. The next prime is 1231063193. The reversal of 1231063158 is 8513601321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231063157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33748 + ... + 60008.

It is an arithmetic number, because the mean of its divisors is an integer number (83001051).

Almost surely, 2^1231063158 is an apocalyptic number.

1231063158 is an abundant number, since it is smaller than the sum of its proper divisors (1424970474).

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

1231063158 is a wasteful number, since it uses less digits than its factorization.

1231063158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26880.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1231063158 is about 35086.5096297708. The cubic root of 1231063158 is about 1071.7498830554.

Adding to 1231063158 its reverse (8513601321), we get a palindrome (9744664479).

The spelling of 1231063158 in words is "one billion, two hundred thirty-one million, sixty-three thousand, one hundred fifty-eight".