231430142 has 4 divisors (see below), whose sum is σ = 347145216. Its totient is φ = 115715070.

The previous prime is 231430141. The next prime is 231430169. The reversal of 231430142 is 241034132.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×231430142² = 107119821252280328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231430141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57857534 + ... + 57857537.

It is an arithmetic number, because the mean of its divisors is an integer number (86786304).

Almost surely, 2^231430142 is an apocalyptic number.

231430142 is a deficient number, since it is larger than the sum of its proper divisors (115715074).

231430142 is a wasteful number, since it uses less digits than its factorization.

231430142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115715073.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 231430142 is about 15212.8282051695. The cubic root of 231430142 is about 613.9598537131.

Adding to 231430142 its reverse (241034132), we get a palindrome (472464274).

The spelling of 231430142 in words is "two hundred thirty-one million, four hundred thirty thousand, one hundred forty-two".