3431220403531 has 4 divisors (see below), whose sum is σ = 3431467250064. Its totient is φ = 3430973557000.

The previous prime is 3431220403529. The next prime is 3431220403537. The reversal of 3431220403531 is 1353040221343.

It is a happy number.

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 3431220403531 - 2¹ = 3431220403529 is a prime.

It is a super-2 number, since 2×3431220403531² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3431220403493 and 3431220403502.

It is not an unprimeable number, because it can be changed into a prime (3431220403537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123402415 + ... + 123430216.

It is an arithmetic number, because the mean of its divisors is an integer number (857866812516).

Almost surely, 2^{3431220403531} is an apocalyptic number.

3431220403531 is a deficient number, since it is larger than the sum of its proper divisors (246846533).

3431220403531 is a wasteful number, since it uses less digits than its factorization.

3431220403531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246846532.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 3431220403531 its reverse (1353040221343), we get a palindrome (4784260624874).

The spelling of 3431220403531 in words is "three trillion, four hundred thirty-one billion, two hundred twenty million, four hundred three thousand, five hundred thirty-one".