4242021431 has 4 divisors (see below), whose sum is σ = 4378860864. Its totient is φ = 4105182000.

The previous prime is 4242021403. The next prime is 4242021457. The reversal of 4242021431 is 1341202424.

4242021431 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4242021431 is a prime.

It is a super-2 number, since 2×4242021431² = 35989491642126575522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4242021397 and 4242021406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4242021461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68419670 + ... + 68419731.

It is an arithmetic number, because the mean of its divisors is an integer number (1094715216).

Almost surely, 2^4242021431 is an apocalyptic number.

4242021431 is a deficient number, since it is larger than the sum of its proper divisors (136839433).

4242021431 is a wasteful number, since it uses less digits than its factorization.

4242021431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136839432.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 4242021431 is about 65130.8024747124. The cubic root of 4242021431 is about 1618.7916395504.

Adding to 4242021431 its reverse (1341202424), we get a palindrome (5583223855).

The spelling of 4242021431 in words is "four billion, two hundred forty-two million, twenty-one thousand, four hundred thirty-one".