3213440431 has 4 divisors (see below), whose sum is σ = 3281811552. Its totient is φ = 3145069312.

The previous prime is 3213440429. The next prime is 3213440437. The reversal of 3213440431 is 1340443123.

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

It is a cyclic number.

It is not a de Polignac number, because 3213440431 - 2¹ = 3213440429 is a prime.

It is a super-2 number, since 2×3213440431² = 20652398807170931522, 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 = 3213440396 and 3213440405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213440437) 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, 34185490 + ... + 34185583.

It is an arithmetic number, because the mean of its divisors is an integer number (820452888).

Almost surely, 2^3213440431 is an apocalyptic number.

3213440431 is a deficient number, since it is larger than the sum of its proper divisors (68371121).

3213440431 is an equidigital number, since it uses as much as digits as its factorization.

3213440431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68371120.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 3213440431 is about 56687.2157633447. The cubic root of 3213440431 is about 1475.6728415097.

Adding to 3213440431 its reverse (1340443123), we get a palindrome (4553883554).

The spelling of 3213440431 in words is "three billion, two hundred thirteen million, four hundred forty thousand, four hundred thirty-one".