231421134 has 16 divisors (see below), whose sum is σ = 528962688. Its totient is φ = 66120312.

The previous prime is 231421133. The next prime is 231421171. The reversal of 231421134 is 431124132.

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

It is a self number, because there is not a number n which added to its sum of digits gives 231421134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231421133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2754972 + ... + 2755055.

It is an arithmetic number, because the mean of its divisors is an integer number (33060168).

Almost surely, 2^231421134 is an apocalyptic number.

231421134 is an abundant number, since it is smaller than the sum of its proper divisors (297541554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231421134 is a wasteful number, since it uses less digits than its factorization.

231421134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5510039.

The product of its digits is 576, while the sum is 21.

The square root of 231421134 is about 15212.5321363670. The cubic root of 231421134 is about 613.9518878505.

Adding to 231421134 its reverse (431124132), we get a palindrome (662545266).

The spelling of 231421134 in words is "two hundred thirty-one million, four hundred twenty-one thousand, one hundred thirty-four".