3544215421 has 2 divisors, whose sum is σ = 3544215422. Its totient is φ = 3544215420.

The previous prime is 3544215419. The next prime is 3544215427. The reversal of 3544215421 is 1245124453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2356034521 + 1188180900 = 48539^2 + 34470^2 .

It is a cyclic number.

It is not a de Polignac number, because 3544215421 - 2¹ = 3544215419 is a prime.

It is a super-2 number, since 2×3544215421² = 25122925900908414482, which contains 22 as substring.

Together with 3544215419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3544215427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1772107710 + 1772107711.

It is an arithmetic number, because the mean of its divisors is an integer number (1772107711).

Almost surely, 2^3544215421 is an apocalyptic number.

It is an amenable number.

3544215421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3544215421 is an equidigital number, since it uses as much as digits as its factorization.

3544215421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 31.

The square root of 3544215421 is about 59533.3135395637. The cubic root of 3544215421 is about 1524.6612768802.

Adding to 3544215421 its reverse (1245124453), we get a palindrome (4789339874).

The spelling of 3544215421 in words is "three billion, five hundred forty-four million, two hundred fifteen thousand, four hundred twenty-one".