231040000 has 165 divisors, whose sum is σ = 609107367. Its totient is φ = 87552000.

The previous prime is 231039971. The next prime is 231040009. The reversal of 231040000 is 40132.

The square root of 231040000 is 15200.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 18113536 + 212926464 = 4256^2 + 14592^2 .

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231040009) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 12159991 + ... + 12160009.

Almost surely, 2^231040000 is an apocalyptic number.

231040000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

231040000 is the 15200-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231040000

231040000 is an abundant number, since it is smaller than the sum of its proper divisors (378067367).

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

231040000 is an frugal number, since it uses more digits than its factorization.

231040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 26 counting only the distinct ones).

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

The cubic root of 231040000 is about 613.6146577516.

Adding to 231040000 its reverse (40132), we get a palindrome (231080132).

The spelling of 231040000 in words is "two hundred thirty-one million, forty thousand".