231000040 has 32 divisors (see below), whose sum is σ = 542350080. Its totient is φ = 88382272.

The previous prime is 231000013. The next prime is 231000041. The reversal of 231000040 is 40000132.

It is a super-2 number, since 2×231000040² = 106722036960003200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 230999990 and 231000026.

It is not an unprimeable number, because it can be changed into a prime (231000041) 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, 124624 + ... + 126463.

It is an arithmetic number, because the mean of its divisors is an integer number (16948440).

Almost surely, 2^231000040 is an apocalyptic number.

231000040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231000040 is an abundant number, since it is smaller than the sum of its proper divisors (311350040).

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

231000040 is a wasteful number, since it uses less digits than its factorization.

231000040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251121 (or 251117 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 231000040 is about 15198.6854694740. The cubic root of 231000040 is about 613.5792793820.

Adding to 231000040 its reverse (40000132), we get a palindrome (271000172).

The spelling of 231000040 in words is "two hundred thirty-one million, forty", and thus it is an aban number.