231002020 has 24 divisors (see below), whose sum is σ = 496387584. Its totient is φ = 90251616.

The previous prime is 231001963. The next prime is 231002027. The reversal of 231002020 is 20200132.

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 = 231001988 and 231002006.

It is not an unprimeable number, because it can be changed into a prime (231002027) 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, 133444 + ... + 135163.

It is an arithmetic number, because the mean of its divisors is an integer number (20682816).

Almost surely, 2^231002020 is an apocalyptic number.

231002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231002020 is an abundant number, since it is smaller than the sum of its proper divisors (265385564).

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

231002020 is a wasteful number, since it uses less digits than its factorization.

231002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268659 (or 268657 counting only the distinct ones).

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

The square root of 231002020 is about 15198.7506065466. The cubic root of 231002020 is about 613.5810324604.

Adding to 231002020 its reverse (20200132), we get a palindrome (251202152).

The spelling of 231002020 in words is "two hundred thirty-one million, two thousand, twenty".