231390201 has 16 divisors (see below), whose sum is σ = 359792000. Its totient is φ = 132222384.

The previous prime is 231390199. The next prime is 231390223. The reversal of 231390201 is 102093132.

It is a happy number.

It is not a de Polignac number, because 231390201 - 2¹ = 231390199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231390241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111406 + ... + 113463.

It is an arithmetic number, because the mean of its divisors is an integer number (22487000).

Almost surely, 2^231390201 is an apocalyptic number.

231390201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

231390201 is a deficient number, since it is larger than the sum of its proper divisors (128401799).

231390201 is an equidigital number, since it uses as much as digits as its factorization.

231390201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224893 (or 224879 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 231390201 is about 15211.5154077429. The cubic root of 231390201 is about 613.9245319220.

The spelling of 231390201 in words is "two hundred thirty-one million, three hundred ninety thousand, two hundred one".