231613142 has 4 divisors (see below), whose sum is σ = 347419716. Its totient is φ = 115806570.

The previous prime is 231613139. The next prime is 231613153. The reversal of 231613142 is 241316132.

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

It is a super-2 number, since 2×231613142² = 107289295094224328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57903284 + ... + 57903287.

It is an arithmetic number, because the mean of its divisors is an integer number (86854929).

Almost surely, 2^231613142 is an apocalyptic number.

231613142 is a deficient number, since it is larger than the sum of its proper divisors (115806574).

231613142 is a wasteful number, since it uses less digits than its factorization.

231613142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115806573.

The product of its digits is 864, while the sum is 23.

The square root of 231613142 is about 15218.8416773419. The cubic root of 231613142 is about 614.1216376694.

Adding to 231613142 its reverse (241316132), we get a palindrome (472929274).

The spelling of 231613142 in words is "two hundred thirty-one million, six hundred thirteen thousand, one hundred forty-two".