231144401 has 4 divisors (see below), whose sum is σ = 238600704. Its totient is φ = 223688100.

The previous prime is 231144383. The next prime is 231144409. The reversal of 231144401 is 104441132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231144401 - 2²⁶ = 164035537 is a prime.

It is a super-2 number, since 2×231144401² = 106855468227297602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231144409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3728105 + ... + 3728166.

It is an arithmetic number, because the mean of its divisors is an integer number (59650176).

Almost surely, 2^231144401 is an apocalyptic number.

It is an amenable number.

231144401 is a deficient number, since it is larger than the sum of its proper divisors (7456303).

231144401 is an equidigital number, since it uses as much as digits as its factorization.

231144401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7456302.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 231144401 is about 15203.4338555472. The cubic root of 231144401 is about 613.7070693643.

Adding to 231144401 its reverse (104441132), we get a palindrome (335585533).

The spelling of 231144401 in words is "two hundred thirty-one million, one hundred forty-four thousand, four hundred one".