5421135621 has 32 divisors (see below), whose sum is σ = 8039098368. Its totient is φ = 3222035840.

The previous prime is 5421135569. The next prime is 5421135631. The reversal of 5421135621 is 1265311245.

5421135621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 5421135621 - 2¹⁰ = 5421134597 is a prime.

It is a super-2 number, since 2×5421135621² = 58777422842550111282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5421135631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 368020 + ... + 382466.

It is an arithmetic number, because the mean of its divisors is an integer number (251221824).

Almost surely, 2^5421135621 is an apocalyptic number.

It is an amenable number.

5421135621 is a deficient number, since it is larger than the sum of its proper divisors (2617962747).

5421135621 is a wasteful number, since it uses less digits than its factorization.

5421135621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14681.

The product of its digits is 7200, while the sum is 30.

The square root of 5421135621 is about 73628.3615259772. The cubic root of 5421135621 is about 1756.6965864791.

Adding to 5421135621 its reverse (1265311245), we get a palindrome (6686446866).

The spelling of 5421135621 in words is "five billion, four hundred twenty-one million, one hundred thirty-five thousand, six hundred twenty-one".