231420031 has 16 divisors (see below), whose sum is σ = 255171168. Its totient is φ = 208972800.

The previous prime is 231420011. The next prime is 231420047. The reversal of 231420031 is 130024132.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 231420031 - 2⁵ = 231419999 is a prime.

It is a super-2 number, since 2×231420031² = 107110461496081922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231419987 and 231420014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231420011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39796 + ... + 45238.

It is an arithmetic number, because the mean of its divisors is an integer number (15948198).

Almost surely, 2^231420031 is an apocalyptic number.

231420031 is a deficient number, since it is larger than the sum of its proper divisors (23751137).

231420031 is a wasteful number, since it uses less digits than its factorization.

231420031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5562.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231420031 is about 15212.4958833191. The cubic root of 231420031 is about 613.9509124426.

Adding to 231420031 its reverse (130024132), we get a palindrome (361444163).

The spelling of 231420031 in words is "two hundred thirty-one million, four hundred twenty thousand, thirty-one".