431021242 has 16 divisors (see below), whose sum is σ = 685706112. Its totient is φ = 202759920.

The previous prime is 431021189. The next prime is 431021243. The reversal of 431021242 is 242120134.

It is a super-2 number, since 2×431021242² = 371558622110445128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (431021243) 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, 73998 + ... + 79609.

It is an arithmetic number, because the mean of its divisors is an integer number (42856632).

Almost surely, 2^431021242 is an apocalyptic number.

431021242 is a deficient number, since it is larger than the sum of its proper divisors (254684870).

431021242 is a wasteful number, since it uses less digits than its factorization.

431021242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153693.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 431021242 is about 20761.0510812916. The cubic root of 431021242 is about 755.3812918445.

Adding to 431021242 its reverse (242120134), we get a palindrome (673141376).

It can be divided in two parts, 43102 and 1242, that added together give a palindrome (44344).

The spelling of 431021242 in words is "four hundred thirty-one million, twenty-one thousand, two hundred forty-two".