32421531409 has 2 divisors, whose sum is σ = 32421531410. Its totient is φ = 32421531408.

The previous prime is 32421531407. The next prime is 32421531431. The reversal of 32421531409 is 90413512423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17557045009 + 14864486400 = 132503^2 + 121920^2 .

It is a cyclic number.

It is not a de Polignac number, because 32421531409 - 2¹ = 32421531407 is a prime.

Together with 32421531407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (32421531403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16210765704 + 16210765705.

It is an arithmetic number, because the mean of its divisors is an integer number (16210765705).

Almost surely, 2^32421531409 is an apocalyptic number.

It is an amenable number.

32421531409 is a deficient number, since it is larger than the sum of its proper divisors (1).

32421531409 is an equidigital number, since it uses as much as digits as its factorization.

32421531409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 32421531409 in words is "thirty-two billion, four hundred twenty-one million, five hundred thirty-one thousand, four hundred nine".