5551532421 has 16 divisors (see below), whose sum is σ = 7719602688. Its totient is φ = 3544704000.

The previous prime is 5551532411. The next prime is 5551532521. The reversal of 5551532421 is 1242351555.

It is not a de Polignac number, because 5551532421 - 2²³ = 5543143813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551532401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298680 + ... + 316721.

It is an arithmetic number, because the mean of its divisors is an integer number (482475168).

Almost surely, 2^5551532421 is an apocalyptic number.

It is an amenable number.

5551532421 is a deficient number, since it is larger than the sum of its proper divisors (2168070267).

5551532421 is a wasteful number, since it uses less digits than its factorization.

5551532421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615532.

The product of its digits is 30000, while the sum is 33.

The square root of 5551532421 is about 74508.6063552393. The cubic root of 5551532421 is about 1770.6699902231.

Adding to 5551532421 its reverse (1242351555), we get a palindrome (6793883976).

The spelling of 5551532421 in words is "five billion, five hundred fifty-one million, five hundred thirty-two thousand, four hundred twenty-one".