5421531421 has 32 divisors (see below), whose sum is σ = 6113733120. Its totient is φ = 4777574400.

The previous prime is 5421531407. The next prime is 5421531431. The reversal of 5421531421 is 1241351245.

5421531421 = T₆₀₁₁₈ + T₆₀₁₁₉ + T₆₀₁₂₀.

It is a 9-Lehmer number, since φ(5421531421) divides (5421531421-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 5421531421 - 2¹⁷ = 5421400349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5421531421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5421531431) 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, 20005516 + ... + 20005786.

It is an arithmetic number, because the mean of its divisors is an integer number (191054160).

Almost surely, 2^5421531421 is an apocalyptic number.

5421531421 is the 60120-th centered triangular number.

It is an amenable number.

5421531421 is a deficient number, since it is larger than the sum of its proper divisors (692201699).

5421531421 is a wasteful number, since it uses less digits than its factorization.

5421531421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805.

The product of its digits is 4800, while the sum is 28.

The square root of 5421531421 is about 73631.0492998708. The cubic root of 5421531421 is about 1756.7393378899.

Adding to 5421531421 its reverse (1241351245), we get a palindrome (6662882666).

The spelling of 5421531421 in words is "five billion, four hundred twenty-one million, five hundred thirty-one thousand, four hundred twenty-one".