5431885421 has 2 divisors, whose sum is σ = 5431885422. Its totient is φ = 5431885420.

The previous prime is 5431885411. The next prime is 5431885447. The reversal of 5431885421 is 1245881345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3952636900 + 1479248521 = 62870^2 + 38461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5431885421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5431885411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2715942710 + 2715942711.

It is an arithmetic number, because the mean of its divisors is an integer number (2715942711).

Almost surely, 2^5431885421 is an apocalyptic number.

It is an amenable number.

5431885421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5431885421 is an equidigital number, since it uses as much as digits as its factorization.

5431885421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153600, while the sum is 41.

The square root of 5431885421 is about 73701.3257750497. The cubic root of 5431885421 is about 1757.8569625801.

The spelling of 5431885421 in words is "five billion, four hundred thirty-one million, eight hundred eighty-five thousand, four hundred twenty-one".