231001421 has 16 divisors (see below), whose sum is σ = 271044480. Its totient is φ = 192741120.

The previous prime is 231001403. The next prime is 231001483. The reversal of 231001421 is 124100132.

It is a cyclic number.

It is not a de Polignac number, because 231001421 - 2⁶ = 231001357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231001396 and 231001405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231004421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246065 + ... + 247001.

It is an arithmetic number, because the mean of its divisors is an integer number (16940280).

Almost surely, 2^231001421 is an apocalyptic number.

It is an amenable number.

231001421 is a deficient number, since it is larger than the sum of its proper divisors (40043059).

231001421 is an equidigital number, since it uses as much as digits as its factorization.

231001421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 231001421 is about 15198.7309009667. The cubic root of 231001421 is about 613.5805021110.

Adding to 231001421 its reverse (124100132), we get a palindrome (355101553).

The spelling of 231001421 in words is "two hundred thirty-one million, one thousand, four hundred twenty-one".