3531350021 has 2 divisors, whose sum is σ = 3531350022. Its totient is φ = 3531350020.

The previous prime is 3531349999. The next prime is 3531350023. The reversal of 3531350021 is 1200531353.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2939157796 + 592192225 = 54214^2 + 24335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3531350021 is a prime.

Together with 3531350023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3531350023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1765675010 + 1765675011.

It is an arithmetic number, because the mean of its divisors is an integer number (1765675011).

Almost surely, 2^3531350021 is an apocalyptic number.

It is an amenable number.

3531350021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3531350021 is an equidigital number, since it uses as much as digits as its factorization.

3531350021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 3531350021 is about 59425.1631970834. The cubic root of 3531350021 is about 1522.8142146246.

Adding to 3531350021 its reverse (1200531353), we get a palindrome (4731881374).

The spelling of 3531350021 in words is "three billion, five hundred thirty-one million, three hundred fifty thousand, twenty-one".