5551421399 has 4 divisors (see below), whose sum is σ = 5600549136. Its totient is φ = 5502293664.

The previous prime is 5551421363. The next prime is 5551421411. The reversal of 5551421399 is 9931241555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5551421399 - 2²⁴ = 5534644183 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 (5551421329) 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, 24563699 + ... + 24563924.

It is an arithmetic number, because the mean of its divisors is an integer number (1400137284).

Almost surely, 2^5551421399 is an apocalyptic number.

5551421399 is a deficient number, since it is larger than the sum of its proper divisors (49127737).

5551421399 is a wasteful number, since it uses less digits than its factorization.

5551421399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49127736.

The product of its digits is 243000, while the sum is 44.

The square root of 5551421399 is about 74507.8613234872. The cubic root of 5551421399 is about 1770.6581865973.

The spelling of 5551421399 in words is "five billion, five hundred fifty-one million, four hundred twenty-one thousand, three hundred ninety-nine".