231001403 has 2 divisors, whose sum is σ = 231001404. Its totient is φ = 231001402.

The previous prime is 231001399. The next prime is 231001483. The reversal of 231001403 is 304100132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231001403 - 2² = 231001399 is a prime.

It is not a weakly prime, because it can be changed into another prime (231001483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115500701 + 115500702.

It is an arithmetic number, because the mean of its divisors is an integer number (115500702).

Almost surely, 2^231001403 is an apocalyptic number.

231001403 is a deficient number, since it is larger than the sum of its proper divisors (1).

231001403 is an equidigital number, since it uses as much as digits as its factorization.

231001403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 231001403 is about 15198.7303088120. The cubic root of 231001403 is about 613.5804861739.

Adding to 231001403 its reverse (304100132), we get a palindrome (535101535).

The spelling of 231001403 in words is "two hundred thirty-one million, one thousand, four hundred three".