231442302 has 32 divisors (see below), whose sum is σ = 569705472. Its totient is φ = 61039584.

The previous prime is 231442279. The next prime is 231442303. The reversal of 231442302 is 203244132.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231442303) 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, 211398 + ... + 212489.

It is an arithmetic number, because the mean of its divisors is an integer number (17803296).

Almost surely, 2^231442302 is an apocalyptic number.

231442302 is an abundant number, since it is smaller than the sum of its proper divisors (338263170).

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

231442302 is a wasteful number, since it uses less digits than its factorization.

231442302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423912.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 231442302 is about 15213.2278626201. The cubic root of 231442302 is about 613.9706065923.

Adding to 231442302 its reverse (203244132), we get a palindrome (434686434).

The spelling of 231442302 in words is "two hundred thirty-one million, four hundred forty-two thousand, three hundred two".