3631435421 has 4 divisors (see below), whose sum is σ = 3641551200. Its totient is φ = 3621319644.

The previous prime is 3631435417. The next prime is 3631435429. The reversal of 3631435421 is 1245341363.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1245341363 = 7 ⋅177905909.

It is a cyclic number.

It is not a de Polignac number, because 3631435421 - 2² = 3631435417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3631435429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5057351 + ... + 5058068.

It is an arithmetic number, because the mean of its divisors is an integer number (910387800).

Almost surely, 2^3631435421 is an apocalyptic number.

It is an amenable number.

3631435421 is a deficient number, since it is larger than the sum of its proper divisors (10115779).

3631435421 is a wasteful number, since it uses less digits than its factorization.

3631435421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10115778.

The product of its digits is 25920, while the sum is 32.

The square root of 3631435421 is about 60261.3924581900. The cubic root of 3631435421 is about 1537.0669169172.

Adding to 3631435421 its reverse (1245341363), we get a palindrome (4876776784).

The spelling of 3631435421 in words is "three billion, six hundred thirty-one million, four hundred thirty-five thousand, four hundred twenty-one".