1156231000 has 32 divisors (see below), whose sum is σ = 2705582880. Its totient is φ = 462492000.

The previous prime is 1156230991. The next prime is 1156231001. The reversal of 1156231000 is 1326511.

It is a super-2 number, since 2×1156231000² = 2673740250722000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156231001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 577116 + ... + 579115.

It is an arithmetic number, because the mean of its divisors is an integer number (84549465).

Almost surely, 2^1156231000 is an apocalyptic number.

1156231000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156231000 is an abundant number, since it is smaller than the sum of its proper divisors (1549351880).

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

1156231000 is a wasteful number, since it uses less digits than its factorization.

1156231000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156252 (or 1156238 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1156231000 is about 34003.3968891345. The cubic root of 1156231000 is about 1049.5783643473.

Adding to 1156231000 its reverse (1326511), we get a palindrome (1157557511).

The spelling of 1156231000 in words is "one billion, one hundred fifty-six million, two hundred thirty-one thousand".