431631142 has 4 divisors (see below), whose sum is σ = 647446716. Its totient is φ = 215815570.

The previous prime is 431631121. The next prime is 431631143. The reversal of 431631142 is 241136134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241136134 = 2 ⋅120568067.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431631143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107907784 + ... + 107907787.

It is an arithmetic number, because the mean of its divisors is an integer number (161861679).

Almost surely, 2^431631142 is an apocalyptic number.

431631142 is a deficient number, since it is larger than the sum of its proper divisors (215815574).

431631142 is a wasteful number, since it uses less digits than its factorization.

431631142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215815573.

The product of its digits is 1728, while the sum is 25.

The square root of 431631142 is about 20775.7344515182. The cubic root of 431631142 is about 755.7374149879.

Adding to 431631142 its reverse (241136134), we get a palindrome (672767276).

The spelling of 431631142 in words is "four hundred thirty-one million, six hundred thirty-one thousand, one hundred forty-two".