231002001 has 24 divisors (see below), whose sum is σ = 355703400. Its totient is φ = 143955456.

The previous prime is 231001963. The next prime is 231002027. The reversal of 231002001 is 100200132.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 50126400 + 180875601 = 7080^2 + 13449^2 .

It is not a de Polignac number, because 231002001 - 2¹⁷ = 230870929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (231002071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17731 + ... + 27863.

It is an arithmetic number, because the mean of its divisors is an integer number (14820975).

Almost surely, 2^231002001 is an apocalyptic number.

It is an amenable number.

231002001 is a deficient number, since it is larger than the sum of its proper divisors (124701399).

231002001 is a wasteful number, since it uses less digits than its factorization.

231002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10305 (or 10302 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 231002001 is about 15198.7499814952. The cubic root of 231002001 is about 613.5810156379.

Adding to 231002001 its reverse (100200132), we get a palindrome (331202133).

The spelling of 231002001 in words is "two hundred thirty-one million, two thousand, one".